**Modern approaches to the invariant subspace problem**,
by Isabelle Chalendar and Jonathan R. Partington (2011),
is published by
Cambridge University Press.
Errata (PDF)

**
Linear Operators and Linear Systems** (2004)
is published by
Cambridge University Press.
Errata (PDF).

** Interpolation, Identification and
Sampling** (1997)
is published by
Oxford University Press.

**
An introduction to Hankel operators**
(1989) is published by
Cambridge University Press.

**
Harmonic
analysis and rational approximation: their
roles in signals, control and dynamical systems theory** (2006),
edited by
J.-D. Fournier, J. Grimm, J. Leblond and
J.R. Partington, is
published by
Springer-Verlag.
It includes my "Fourier transforms and complex analysis", pp. 39-55, and
"Good bases", pp. 95-102.

The rest of this page contains a list of my papers and preprints, excluding
conference papers for which a journal version exists.
Recent ones are mostly on
arXiv and the
White Rose depository.
For **incomplete** lists of those published,
try
MathSciNet
or MR lookup
or Zentralblatt lookup
or
Web of Knowledge
or
Google Scholar.

E.A. Gallardo-Gutiérrez, J.R. Partington and D. Seco, On the wandering property in Dirichlet spaces, preprint, 2019.

I. Chalendar and J.R. Partington,
The reproducing kernel thesis for lower bounds of weighted composition
operators,
*Archiv der Mathematik*, accepted.
arXiv version.

J.R. Partington, S. Pott and R. Zawiski, Laplace-Carleson embeddings on model spaces and boundedness of truncated Hankel and Toeplitz operators, preprint, 2018. arXiv version.

M.C. Câmara and J.R. Partington, Scalar-type kernels for block Toeplitz operators, preprint, 2018. arXiv version.

J.R. Partington and R. Zawiski,
Admissibility of diagonal state-delayed systems with a one-dimensional
input space,
*Complex Analysis and Operator Theory*, accepted.
arXiv version.

B. Célariès, I. Chalendar, and J.R. Partington,
Universality and models for semigroups of operators on a Hilbert space,
*J. Operator Theory*, accepted.
arXiv version.

B. Jacob, A. Mironchenko, J.R. Partington and F. Wirth, Remarks on input-to-state stability and non-coercive Lyapunov functions, preprint, 2018.

P. Gorkin and J.R. Partington,
Norms of truncated Toeplitz operators and numerical radii of restricted shifts,
*Computational Methods and Function theory*, accepted.
arXiv version.

M.C. Câmara and J.R. Partington,
Toeplitz kernels and model spaces,
in *The Diversity and Beauty of Applied Operator Theory*,
Ed. A. Böttcher,
D. Potts,
P. Stollmann and
D. Wenzel,
Operator Theory: Advances and Applications, Vol. 268, Birkhäuser (2018),
139-153.
arXiv version.

I. Chalendar, J. Esterle and J.R. Partington,
Estimates near the origin for functional calculus on analytic semigroups,
*Journal of Functional Analysis*, 275 (2018), 698-711.

M.C. Câmara and J.R. Partington,
Multipliers and equivalences between Toeplitz kernels,
*J. Math. Anal. and Appl.*, 465 (2018), 557-570.

I. Chalendar, E.A. Gallardo-Gutiérrez and
J.R. Partington,
A Beurling theorem for almost-invariant subspaces of the shift operator,
* J. Operator Theory*, accepted.

R. Zawiski and J.R. Partington, On the admissibility of retarded delay systems, preprint, 2017, revised 2018. arXiv version.

I. Chalendar, P. Gorkin, J.R. Partington and W.T. Ross,
Clark measures and a theorem of Ritt,
*Mathematica Scandinavica*, 122 (2018), 277-298.

B. Jacob, R. Nabiullin, J.R. Partington and F. Schwenninger,
Infinite-dimensional input-to-state stability and Orlicz spaces, *SIAM J. Control Optim.*,
56 (2018), no. 2, 868-889.
arXiv version.

A. Bashar Abusaksaka and J.R. Partington, Diffusive systems and
weighted Hankel operators,
*Operators and Matrices*, 11 (2017), no. 1, 125-132.
arXiv version.

B. Jacob, R. Nabiullin, J. Partington and F. Schwenninger, On
input-to-state-stability and integral input-to-state-stability for
parabolic boundary control systems,
*55th IEEE Conference on Decision and
Control, Las Vegas, 2016*.

I. Chalendar and J.R. Partington,
Compactness, differentiability and similarity to isometry of composition semigroups,
*Problems and Recent Methods in Operator Theory*,
Ed. F. Botelho, R. King, and T.S.S.R.K. Rao,
Contemporary Mathematics 687, Amer. Math. Soc., 2017, 67-73.

E.A. Gallardo-Gutiérrez and
J.R. Partington,
*C _{0}*-semigroups of 2-isometries and Dirichlet spaces,

I. Chalendar and J.R. Partington,
Compactness and norm estimates for weighted composition operators on spaces of holomorphic functions,
*Harmonic Analysis, Function Theory,
Operator Theory and their Applications,*
Ed. P. Jaming, A. Hartmann, K. Kellay, S. Kupin, G. Pisier and D. Timotin,
Theta, 2017, 81-89.

B. Jacob, J.R. Partington, S. Pott and A. Wynn.
β-admissibility of observation and control
operators for hypercontractive semigroups,
*J. Evolution Equations*, 18 (2018), no. 1, 153-170.

I. Chalendar and J.R. Partington,
A class of quasicontractive semigroups acting on Hardy and weighted Hardy spaces,
*Semigroup Forum*, 95 (2017), 281-292.

M.C. Câmara and J.R. Partington,
Spectral properties of truncated Toeplitz operators by equivalence after extension,
*J. Math. Anal. and Appl.*,
433 (2016), 762-784.

C. Avicou, I. Chalendar and J.R. Partington,
Analyticity and compactness of semigroups of composition operators,
*J. Math. Anal. and Appl.*, 437 (2016), 545-560.

E.A. Gallardo-Gutiérrez,
J.R. Partington and
D.J. Rodríguez,
A continuous model for quasinilpotent operators,
*Math. Zeitschrift*, 284 (2016), 781-790.

M.C. Câmara and J.R. Partington,
Asymmetric truncated Toeplitz operators and Toeplitz operators with matrix symbol,
*J. Operator Theory*, 77 (2017), 455-479.

I. Chalendar, P. Gorkin and J.R. Partington,
Inner functions and operator theory,
*North-Western Euro. J. Math.* 1 (2015), 7-22.

C. Avicou, I. Chalendar and J.R. Partington,
A class of quasicontractive semigroups acting on Hardy and Dirichlet space,
*J. Evolution Equations*, 15 (2015), 647-665.

E.A. Gallardo-Gutiérrez,
J.R. Partington and
D.J. Rodríguez,
An extension of a theorem of Domar on invariant subspaces,
*Acta Sci. Math. (Szeged)*,
83 (2017), 271-290.

I. Chalendar, E.A. Gallardo-Gutiérrez and
J.R. Partington,
Weighted composition operators on the Dirichlet space:
boundedness and spectral properties,
*Math. Annalen*, 363 (2015), 1265-1279.

M.C. Câmara and J.R. Partington,
Finite-dimensional Toeplitz kernels and nearly-invariant subspaces,
*J. Operator Theory*,
75 (2016), no. 1, 75-90.

M.C. Câmara, M.T. Malheiro and J.R. Partington,
Model spaces
and Toeplitz kernels
in reflexive Hardy spaces,
*Operators and Matrices*,
10 (2016), no. 1, 127-148.

I. Chalendar, J. Esterle and J.R. Partington,
Dichotomy results for norm estimates in operator semigroups,
*Operator Semigroups meet Complex Analysis, Harmonic Analysis and
Mathematical Physics*. Ed. by W. Arendt, R. Chill and Y. Tomilov,
Operator Theory: Advances and Applications, Vol. 250, Birkhäuser (2015), 119-131.

I. Chalendar, J. Esterle and J.R. Partington,
Lower estimates near the origin for functional calculus
on operator semigroups,
*Journal of Functional Analysis*,
269 (2015), 1620-1635.

I. Chalendar and J.R. Partington,
Phragmén--Lindelöf principles for generalized analytic functions on unbounded domains,
*Complex Analysis and Operator Theory*,
10 (2016), 61-68.

I. Chalendar and J.R. Partington,
Norm estimates for weighted composition operators
on spaces of holomorphic functions,
*Complex Analysis and Operator Theory*,
8 (2014), 1087-1095.

A. Bashar Abusaksaka and J.R. Partington,
BIBO stability of some classes of delay systems and fractional systems,
*Systems and Control Letters*, 64 (2014), 43-46.

M.C. Câmara and J.R. Partington,
Near invariance and kernels of Toeplitz operators,
*Journal d'Analyse Math.* 124 (2014), 235-260.

B. Jacob, J.R. Partington and S. Pott,
Weighted multiple interpolation and the control of perturbed semigroup systems,
*Journal of Evolution Equations*,
13 (2013), 395-410.

J. Leblond, J.R. Partington and E. Pozzi,
Best approximation in Hardy spaces and by polynomials, with
norm constraints,
*Integral Equations
and Operator Theory*,
75 (2013), 491-516.

I. Chalendar and J.R. Partington,
An overview of some recent developments on the invariant subspace problem,
*Concrete Operators*, 1 (2012), 1-10.

I. Chalendar, P. Gorkin and J.R. Partington,
Prime and semiprime inner functions,
*J. London Math. Soc.*, (2) 88 (2013), 779-800.

B. Jacob, J.R. Partington and S. Pott,
Applications of Laplace-Carleson embeddings to admissibility and
controllability,
*SIAM J. Control. Optim.*,
52 (2014), 1299-1313.

B. Jacob, J.R. Partington and S. Pott,
On Laplace-Carleson embedding theorems,
*Journal of Functional Analysis*,
264 (2013), 783-814.

E.A. Gallardo-Gutiérrez and
J.R. Partington,
Norms of composition operators on weighted Hardy spaces,
*Israel J. Math.* 196 (2013), no. 1, 273-283.

J.R. Partington, Interpolation in Hardy spaces, with applications,
*Topics in Functional and Harmonic Analysis. Le Touquet, Metz, Lens 2010,*
Ed. by C. Badea, D. Li and V. Petkova,
Theta Foundation (2012), 103-122.

J.R. Partington,
Interpolation, Carleson measures and controllability,
*Actas de Colloquium* (UCM, Madrid), 2011, Sec. 1, Num. 77, 123-130.

I. Chalendar, P. Gorkin and J.R. Partington,
Determination of inner functions by their value sets on the circle,
*Computational Methods and Function theory*,
11 (2011), 353-373.

I. Chalendar, P. Gorkin and J.R. Partington,
The group of invariants of an inner function with
finite spectrum, *J. Math. Anal. and Appl.*,
389 (2012), 1259-1267.

E.A. Gallardo-Gutiérrez and
J.R. Partington,
A generalization of the Aleksandrov operator and adjoints of weighted
composition operators,
*Annales de l'Institut Fourier*,
63 (2013), 373-389.

B. Jacob, J.R. Partington and S. Pott,
Weighted interpolation in Paley-Wiener spaces and finite-time controllability,
*Journal of Functional Analysis*,
259 (2010), 2424-2436.

Y. Fischer, J. Leblond, J.R. Partington and E. Sincich,
Bounded extremal problems in Hardy spaces for the conjugate Beltrami
equation in simply-connected domains,
*Applied and Computational Harmonic Analysis*,
31 (2011), 264-285.

C. Bonnet, A.R. Fioravanti and J.R. Partington,
Stability of neutral systems with commensurate delays and poles
asymptotic to the imaginary axis,
*SIAM J. Control Optimiz.*,
49 (2011), 498-516.

J.R. Partington and E. Pozzi,
Universal shifts and composition operators,
*Operators and Matrices*, 5 (2011), 455-467.

I. Chalendar, J. Esterle and J.R. Partington,
Boundary values of analytic semigroups
and associated norm estimates,
*Banach Algebras 2009*,
Banach Center Publications 91 (2010), 87-103.

I. Chalendar, P. Gorkin and J.R. Partington,
Boundary interpolation and approximation by
infinite Blaschke products,
*Mathematica Scandinavica*,
107 (2010), 305-319.

E.A. Gallardo-Gutiérrez and
J.R. Partington,
The role of
BMOA in the boundedness of weighted composition operators,
*Journal of Functional Analysis*,
258 (2010), 3593-3603.
Corrigendum, *Ibid.*, 259 (2010), 2757-2758.

I. Chalendar, J.R. Partington and E. Pozzi,
Multivariable weighted composition operators: lack of
point spectrum, and cyclic vectors,
in
J.A. Ball, V. Bolotnikov, J.W. Helton, L. Rodman
and I.M. Spitkovsky:
*
Topics in Operator Theory
Volume 1: Operators, Matrices and Analytic functions*,
Operator Theory: Advances and Applications, Vol. 202,
Birkhäuser (2010), 63-85.

Z. Bendaoud, I. Chalendar, J. Esterle and J.R. Partington,
Distances between
elements of a semigroup and estimates for derivatives,
*Acta Mathematica Sinica*, 26 (2010), 2239-2254.

I. Chalendar, P. Gorkin and J.R. Partington,
Numerical ranges of restricted shifts and unitary dilations,
*Operators and Matrices*, 3 (2009), 271-281.

B. Jacob, J.R. Partington and S. Pott, Zero-class admissibility of observation operators,
*Systems and Control Letters*, 58 (2009), 406-412.

E.A. Gallardo-Gutiérrez, R. Kumar and
J.R. Partington,
Boundedness, compactness and Schatten-class
membership of weighted composition operators,
*Integral Equations and Operator Theory*, 67 (2010), 467-479.

B.H. Haak, B. Jacob, J.R. Partington and S. Pott,
Admissibility and controllability of diagonal Volterra
equations with scalar inputs,
*J. Differential Equations*,
246 (2009), 4423-4440.

B. Atfeh,
L. Baratchart, J. Leblond and J.R. Partington,
Bounded
extremal and Cauchy-Laplace problems on the sphere and shell.
*J. Fourier Anal. Appl.*,
16 (2010), 177-203.

B. Jacob, J.R. Partington and S. Pott,
Tangential interpolation in weighted vector-valued *H ^{p}*
spaces, with
applications,

M. Jaoua, J. Leblond, M. Mahjoub and J.R. Partington,
Robust numerical
algorithms based on analytic approximation for the solution of inverse
problems in annular domains,
*IMA J. Appl. Math*,
74 (2009), 481-506.

M. Jaoua,
S. Chaabane,
C. Elhechmi,
J. Leblond,
M. Mahjoub and
J.R. Partington,
On some robust algorithms for the Robin inverse problem,
*Revue Africaine de la Recherche
en Informatique
et Mathématiques Appliquées (ARIMA Review)*,
9 (2008), 287-307.

I. Chalendar and J.R. Partington,
Invariant subspaces for products of Bishop operators,
*Acta Sci. Math. (Szeged)*,
74 (2008), 717-725.

I. Chalendar, N. Chevrot and J.R. Partington,
Nearly invariant subspaces for backwards shifts on
vector-valued Hardy spaces,
*Journal of Operator Theory*,
63 (2010), 403-415.

E.A. Gallardo-Gutiérrez and J.R. Partington,
Invariant subspaces for translation, dilation and multiplication semigroups,
*Journal d'Analyse Math.*,
107 (2009), 65-78.

I. Chalendar and J.R. Partington,
Doubly-invariant subspaces for the shift on the
vector-valued Sobolev spaces of the disc and annulus,
*Integral Equations and Operator Theory*, 61 (2008), 149-158.

B. Jacob, J.R. Partington and S. Pott,
Interpolation by vector-valued analytic functions, with
applications to controllability,
*Journal of Functional Analysis*, 252 (2007), 517-549.

E.A. Gallardo-Gutiérrez and J.R. Partington,
Common hypercyclic vectors for families of operators,
*Proc. Amer. Math. Soc.*,
136 (2008), 119-126.

I. Chalendar, N. Chevrot and J.R. Partington,
Invariant subspaces for the shift on the vector-valued *L ^{2}*
space of an annulus,

C. Bonnet and J.R. Partington,
Stabilization of some fractional delay systems of neutral type,
*Automatica*,
43 (2007), 2047-2053.

I. Chalendar and J.R. Partington,
Applications of moment problems to the overcompleteness of sequences,
*Mathematica Scandinavica*, 101 (2007), 249-260.

J.R. Partington and R.C. Smith, *L ^{1}* factorizations
and invariant subspaces for weighted composition operators,

E.A. Gallardo-Gutiérrez, J.R. Partington and D. Segura,
Cyclic vectors and
invariant subspaces
for Bergman and Dirichlet shifts,
*Journal of Operator Theory*,
62 (2009), 199-214.

P.M. Mäkilä and J.R. Partington,
A two-operator approach to robust stabilization of linear systems on **R**,
*Int. J. Control*, 79 (2006), 1026-1038.

B. Jacob and J.R. Partington,
A resolvent test for admissibility of Volterra observation operators,
*J. Math. Anal. and Appl.*, 332 (2007), 346-355.

I. Chalendar and J.R. Partington,
Multivariable approximate Carleman-type theorems for complex measures,
*Annals of Probability*, 35 (2007), 384-396.

I. Chalendar, A. Flattot and J.R. Partington,
The method of minimal vectors applied to
weighted composition operators, in M.A. Dritschel:
*The extended field of operator theory*,
Operator Theory: Advances and Applications, Vol. 171,
Birkhäuser (2007),
89-105.

J.R. Partington and S. Pott, Admissibility and exact observability of observation
operators for semigroups,
*Irish Math. Soc. Bull.*,
55 (2005), 19-39.

I. Chalendar and J.R. Partington, An image problem for compact operators,
*Proc. Amer. Math. Soc.*,
134 (2006), 1391-1396.

I. Chalendar and J.R. Partington,
Variations on Lomonosov's theorem via the technique of
minimal vectors,
*Acta Sci. Math. (Szeged)*,
71 (2005), 603-617.

J.R. Partington and
P.M. Mäkilä,
Rational approximation of
distributed-delay controllers,
*Int. J. Control*, 78 (2005), 1295-1301.

J. Leblond, M. Mahjoub and J.R. Partington,
Analytic extensions and
Cauchy-type inverse problems on annular domains:
stability results,
*J. Inverse Ill-Posed Probl.*, 14 (2006), 189-204.

J. Leblond, J.-P. Marmorat and J.R. Partington,
Analytic approximation under real constraints, with applications to
inverse diffusion problems, *J. Inverse Ill-Posed Probl.*,
16 (2008), 89-105.

I. Chalendar, J.R. Partington and R.C. Smith,
*L ^{1}* factorizations, moment problems and
invariant subspaces,

B. Jacob and J.R. Partington,
On controllability of diagonal systems with one-dimensional input space,
*Systems and Control Letters*,
55 (2006), 321-328.

E.A. Gallardo-Gutiérrez and J.R. Partington,
Supercyclic vectors and the angle criterion,
*Studia Mathematica*,
166 (2005), 93-99.

J.R. Partington,
Some frequency-domain approaches to the model reduction of delay systems,
*Annual Reviews in Control*,
28 (2004), 65-73.

B. Jacob and J.R. Partington,
Admissible control and observation operators for Volterra integral equations,
*Journal of Evolution Equations*,
4 (2004), 333-343.

C. Bonnet and J.R. Partington,
Robust stability analysis of various classes of delay systems,
in S.I. Niculescu and K. Gu:
*Advances in time-delay systems*, Springer-Verlag (2004), 245-256.

P.M. Mäkilä and J.R. Partington,
Least squares LTI approximation of nonlinear
systems and quasistationarity analysis,
*Automatica*, 40 (2004), 1157-1169.

I. Chalendar, L. Habsieger, J.R. Partington and T.J. Ransford,
Approximate Carleman theorems and a Denjoy-Carleman maximum principle,
*Archiv der Mathematik*, 83 (2004), 88-96.

I. Chalendar and J.R. Partington,
Convergence properties of minimal vectors for normal operators and weighted shifts,
*Proc. Amer. Math. Soc.*,
133 (2005), 501-510.

R. Kumar and J.R. Partington, Weighted composition operators
on Hardy and Bergman spaces, in
D. Gaspar, I. Gohberg, D. Timotin, F.H. Vasilescu, L. Zsido:
*Recent advances in operator theory, operator algebras, and their applications*,
Proc. XIXth International Conference on Operator Theory (Timisoara), 2002,
Operator Theory: Advances and Applications, Vol. 153,
Birkhäuser
(2005), 157-167.

J.R. Partington and C. Bonnet,
*H _{}*
and BIBO stabilization of
delay systems of neutral type,

B. Jacob and J.R. Partington, Admissibility of control and
observation operators for semigroups: a survey, in
J.A. Ball, J.W. Helton, M. Klaus and L. Rodman:
*Current Trends in Operator Theory and its Applications,
Proceedings of IWOTA 2002*,
Operator Theory: Advances and Applications, Vol. 149,
Birkhäuser (2004), 199-221.

I. Chalendar, E. Fricain and J.R. Partington,
Overcompleteness of sequences
of reproducing kernels in model spaces.
*Integral Equations and Operator Theory*, 56 (2006),
45-56.

J.J. Winkin,
F.M. Callier, B. Jacob and J.R. Partington,
Spectral factorization by symmetric extraction for distributed
parameter systems,
*SIAM J. Control Optimiz.*, 43 (2005),
1435-1466.

P.M. Mäkilä and J.R. Partington,
Input-output stabilization
of linear systems on **Z**,
*I.E.E.E. Trans. Automat. Control*,
49 (2004), 1916-1928.

I. Chalendar, J.R. Partington and M. Smith, Approximation in reflexive
Banach spaces and applications to the invariant subspace problem,
*Proc. Amer. Math. Soc.*, 132 (2004), 1133-1142.

B. Jacob, J.R. Partington and S. Pott,
Conditions for admissibility of observation operators and
boundedness of Hankel operators,
*Integral Equations and Operator Theory*,
47 (2003), 315-338.

C. Bonnet, J.R. Partington and M. Sorine,
A modified matching pursuit algorithm applied
to the approximation of vecto-cardiogram data,
*Internat. J. Pure Appl. Math.*,
15 (2004), 25-35.
A fuller version is
*INRIA Rapport de Recherche,* No. 4535 (2002).
PDF file

I. Chalendar and J.R. Partington, Constrained approximation
and invariant subspaces,
*J. Math. Anal. and Appl.*, 280 (2003),
176-187.

J.R. Partington, Model reduction of delay systems, in
V.D. Blondel and A. Megretski,
*Unsolved problems in mathematical systems and control theory*,
Princeton University Press (2004),
29-32.

I. Chalendar and J.R. Partington,
Spectral density for multiplication operators with applications
to factorization of *L ^{1}* functions,

P.M. Mäkilä and J.R. Partington,
Input-output stabilization on the doubly-infinite time axis,
*Int. J. Control*, 75 (2002), 981-987.

L. Baratchart, J. Grimm, J. Leblond and J.R. Partington,
Asymptotic estimates for interpolation and constrained approximation
in *H ^{2}* by diagonalization of Toeplitz operators,

P.M. Mäkilä and J.R. Partington,
On linear models for nonlinear systems,
*Automatica*, 39 (2003), 1-13.

J.R. Partington and P.M. Mäkilä,
On system gains for linear and nonlinear systems,
*Systems and Control Letters*, 46 (2002), 129-136.

I. Chalendar and J.R. Partington,
On the structure of invariant subspaces for isometric
composition operators on *H ^{2}(D)*
and

B. Jacob, J. Leblond, J.-P. Marmorat and J.R. Partington,
A constrained approximation problem arising in parameter
identification,
*Linear Algebra and its Applications*, 351-352 (2002), 487-500.

I. Chalendar, J. Leblond and J.R. Partington,
Approximation problems in some holomorphic spaces, with applications, in
A.A. Borichev and N.K. Nikolski:
*Systems, Approximation, Singular Integral Operators, and
Related Topics,
Proceedings of IWOTA 2000*,
Operator Theory: Advances and Applications, Vol. 129,
Birkhäuser (2001), 143-168.

B. Jacob, J.R. Partington and S. Pott,
Admissible and weakly admissible observation
operators for the right shift semigroup,
*Proc. Edinburgh Math. Soc.*, 45 (2002), 353-362.

I. Chalendar and J.R. Partington, *L ^{1}* factorizations for some
perturbations of the unilateral shift,

C. Bonnet and J.R. Partington,
Analysis of fractional delay systems of retarded and neutral type,
*Automatica*, 38 (2002),
1133-1138.

C. Bonnet and J.R. Partington,
Stabilization of fractional exponential systems including delays,
*Kybernetika*, 37 (2001), 345-353.

K.J. Harrison, J.R. Partington and J.A. Ward,
Input-output identifiability
of continuous-time linear systems,
*Journal of Complexity*, 18 (2002), 210-223.

I. Chalendar and J.R. Partington,
Interpolation between Hardy spaces on circular domains with
applications to approximation,
*Archiv der Mathematik*, 78 (2002), 223-232.

B. Jacob and J.R. Partington,
The Weiss conjecture on admissibility
of observation operators for
contraction
semigroups,
*Integral Equations and Operator Theory*, 40 (2001), 231-243.

B. Jacob, J.R. Partington and B. Ünalmis,
On discrete-time linear systems with almost-periodic kernels,
*J. Math. Anal. and Appl.*, 252 (2000), 549-570.

J.R. Partington and G.K. Sankaran,
Algebraic construction of
normalized coprime factors for delay systems,
*Math. Control, Signals and Systems*, 15 (2002), 1-12.

B. Jacob and J.R. Partington,
Graphs, closability, and causality of linear time-invariant discrete-time
systems,
*Int. J. Control*, 73 (2000), 1051-1060.

C. Bonnet and J.R. Partington,
Coprime factorizations and stability of fractional differential
systems,
*Systems and Control Letters*, 41 (2000), 167-174.

J.R. Partington and B. Ünalmis,
On the windowed Fourier transform and wavelet
transform of almost periodic functions,
*Applied and Computational Harmonic Analysis*, 10 (2001), 45-60.

B. Jacob and J.R. Partington,
On the boundedness and continuity of the spectral factorization mapping,
*SIAM J. Control Optimiz.*, 40 (2001), 88-106.

J.R. Partington and G. Weiss,
Admissible observation operators for the right shift semigroup,
*Math. Control, Signals and Systems,* 13 (2000), 179-192.

P.M. Mäkilä and J.R. Partington,
Robustness in
*H _{}*
identification,

J. Leblond and J.R. Partington,
Constrained approximation and interpolation in Hilbert
function spaces,
*J. Math. Anal. and Appl.*
234 (1999), 500-513.

I. Chalendar and J.R. Partington,
Approximation problems and representations of Hardy spaces in
circular domains.
*Studia Mathematica,* 136 (1999), 255-269.

P.M. Mäkilä and J.R. Partington,
Shift operator induced approximations of delay systems,
*SIAM J. Control Optimiz.*,
37 (1999), 1897-1912.

P.M. Mäkilä and J.R. Partington,
Laguerre and Kautz shift approximations of delay systems,
*Int. J. Control,* 72 (1999), 932-946.

L. Baratchart, J. Leblond and J.R. Partington,
Constrained *H ^{p}* interpolation on subsets of the circle,

L. Baratchart, J. Leblond and J.R. Partington,
Problems of Adamjan-Arov-Krein type on subsets of the circle
and minimal-norm extensions,
*Constructive Approximation,* 16 (2000), 333-357.

C. Bonnet, J.R. Partington and M. Sorine,
Robust stabilization of a delay system with
saturating actuator or sensor,
*Int. J. Robust Nonlin. Control,* 10 (2000), 579-590.

C. Bonnet, J.R. Partington and M. Sorine,
Digital phase-locked loops tracked by a relay sensor.
*I.E.E.E. Trans. Communications,* 47 (1999), 667-669.

P.M. Mäkilä and J.R. Partington,
On robustness in system identification,
*Automatica, * 35 (1999), 907-916.

J.R. Partington,
Input design for worst-case identification, in
V.D. Blondel, E.D. Sontag,
M. Vidyasagar and J.C. Willems:
*Open Problems in Mathematical Systems and Control Theory,*
Springer-Verlag (1998), 163-166.

C. Bonnet, J.R. Partington and M. Sorine,
Robust control and tracking in
*L _{}*
of delay systems
equipped with a relay sensor, in
N.T. Koussoulas and P. Groumpos:

J.R. Partington,
Worst-case errors of linear algorithms for identification
in
*H _{}* ,

K.J. Harrison, J.R. Partington and J.A. Ward,
Complexity of identification of linear systems with
rational transfer functions,
*Math. Control Sig. Sys. * 11 (1998), 265-288.

P.M. Mäkilä, J.R. Partington and T. Norlander,
Bounded power signal spaces for robust control and modelling,
*SIAM J. Control Optimiz. * 37 (1999), 92-117.

J.R. Partington and B. Ünalmis,
On the representation of shift-invariant operators by transfer
functions,
*Systems and Control Letters*, 33 (1998), 25-30.

P.M. Mäkilä and J.R. Partington, Lethargy results in LTI system
modelling, *Automatica, *
34 (1998), 1061-1070.

C. Bonnet and J.R. Partington, Bézout factors
and *L ^{1}*-optimal
controllers for delay systems using a two-parameter compensator scheme,

N.F. Dudley Ward and J.R. Partington, A construction of rational
wavelets and frames in Hardy-Sobolev spaces, with applications to system
modelling,
*SIAM J. Control Optimiz., * 36 (1998), 654-679.

J.R. Partington and P.M. Mäkilä, Modelling of linear
fading-memory systems, *I.E.E.E. Trans. Automat. Control,*
41 (1996), 899-903.

P.M. Mäkilä, J.R. Partington and T.K. Gustafsson, Worst-case
control-relevant identification, *Automatica,* 31 (1995), 1799-1819.

L. Baratchart, J. Leblond, J.R. Partington and N. Torkhani, Robust
identification from band-limited data, *I.E.E.E. Trans. Automat.
Control,*
42 (1997), 1318-1325.
An abstract and longer version are
available here.

L. Baratchart, J. Leblond and J.R. Partington, Hardy approximation
to
*L ^{}*
functions on subsets of the circle,

N.F. Dudley Ward and J.R. Partington, Robust identification in the
disc algebra using rational wavelets and orthonormal basis functions,
*Int. J. Control, *64 (1996), 409-423.

C. Bonnet and J.R. Partington, Robust stabilization in the BIBO gap
topology, * Int. J. Robust Nonlin. Control,* 7 (1997), 429-447.

N.F. Dudley Ward and J.R. Partington, Rational wavelet
decompositions of transfer functions in Hardy-Sobolev classes, *Math.
Control, Signals and Systems,* 8 (1995), 257-278.

J.R. Partington, Recovery of functions by interpolation and sampling, *
J. Math. Anal. and Appl.,* 198 (1996), 301-309.

J.R. Partington and P.M. Mäkilä, Analysis of linear methods for
robust identification in *l _{1}*,

J.R. Partington and P.M. Mäkilä, Worst case analysis of the
least-squares method and related identification methods, *Systems and Control
Letters,* 24 (1995), 193-200.

N. Das and J.R. Partington, Little Hankel operators on the half
plane, *Integral Equations Operator Theory,* 20 (1994), 306-324.

J.R. Partington and P.M. Mäkilä, Worst-case analysis of
identification - BIBO robustness for closed-loop data,
*I.E.E.E. Trans.
Automat. Control,* 39 (1994), 2171-2176.

J.R. Partington, Worst case identification in
*l _{2}* :
linear and
nonlinear algorithms,

J.R. Partington, Interpolation in normed spaces from the values of
linear functionals,* Bull. London Math. Soc.,* 26 (1994), 165-170.

P.M. Mäkilä and J.R. Partington, On bounded error identification
of feedback systems, *Int. J. Adaptive Control and Signal
Processing,* 9 (1995), 47-61.

J.R. Partington, Algorithms for identification in
*H _{}*
with
unequally spaced function measurements,

C.A. Jacobson, C.N. Nett and J.R. Partington, Worst case
identification in *l _{1}* : optimal algorithms and error bounds,

P.M. Mäkilä and J.R. Partington, Robust stabilization - BIBO
stability, distance notions and robustness optimization,
*Automatica*, 29 (1993), 681-693.

P.M. Mäkilä and J.R. Partington, Robust approximate modelling of
stable linear systems,
*Int. J. Control,* 58 (1993), 665-683.

J.R. Partington, Worst-case identification in Banach spaces,
*Systems and
Control Letters,* 18 (1992), 423-428.

P.M. Mäkilä and J.R. Partington,
Identification of feedback systems from time series,
in R.S. Smith and M. Dahleh:
*The modeling of uncertainty in control systems*,
Springer Lecture Notes in Control and Information Sciences No. 192 (1994),
117-126.

P.M. Mäkilä and J.R. Partington, Robust identification of
strongly stabilizable systems,
*I.E.E.E. Trans.
Automat. Control,
*37 (1992),
1709-1716.

J.R. Partington, Robust control and approximation in the chordal
metric, in S. Hosoe: *Robust Control,* Springer Lecture Notes in Control and
Information Sciences No. 183 (1992), 82-89.

J.R. Partington, The *L _{2}* approximation of infinite-dimensional
systems, in N.K. Nichols and D.H. Owens:

J.R. Partington, Robust identification in
*H _{}* ,

J.R. Partington, Robust identification and interpolation in
*H _{}* ,

J.R. Partington, Approximation of unstable infinite-dimensional
systems using coprime factors,
*Systems and Control Letters,* 16 (1991), 89-96.

J.R. Partington, Approximation of delay systems by Fourier-Laguerre
series, *
Automatica,* 27 (1991), 569-572.

K. Glover, J. Lam and J.R. Partington, Rational approximation of a
class of infinite-dimensional systems: The *L _{2}*
case, in P. Nevai and
A. Pinkus:

K. Glover, J. Lam and J.R. Partington, Rational approximation of a
class of infinite-dimensional systems II: Optimal convergence rates of
*L _{}*
approximants,

K. Glover, J. Lam and J.R. Partington, Rational approximation of a
class of infinite-dimensional systems I: Singular values of Hankel operators,
*Math. Control Sig. Sys.,* 3 (1990), 325-344.

J.R. Partington and K. Glover, Robust stabilization of delay systems
by approximation of coprime factors,
*Systems and Control Letters,* 14 (1990), 325-331.

J.R. Partington, K. Glover, H.J. Zwart and R.F. Curtain,
*L _{}*
approximation and nuclearity of delay systems,

H.J. Zwart, R.F. Curtain, J.R. Partington and K. Glover, Partial
fraction expansions for delay systems,
*Systems and Control Letters,* 10 (1988), 235-244.

K. Glover, R.F. Curtain and J.R. Partington, Realization and
approximation of linear infinite dimensional systems with error bounds,
*SIAM J. Control Optimiz.*, 26 (1988), 863-898.

K. Glover and J.R. Partington, Bounds on the achievable accuracy in
model reduction, in R.F. Curtain:
*Modelling robustness and sensitivity reduction
in control systems,* Springer-Verlag (1987), 95-118.

K. Glover, J. Lam and J.R. Partington, Balanced realisation and
Hankel-norm approximation of systems involving delays,
*Proc. 25th
I.E.E.E. conference on Decision and Control, Athens,* I.E.E.E.
(1986), 1810-1815.

J.R. Partington, Orthogonality in normed spaces,
*J. Austral. Math. Soc.,* 35 (1986), 449-455.

J.R. Partington, B-convexity, super-reflexivity and summability,
*Quart. J. Math.,*
(2) 37 (1986), 467-471.

J.R. Partington, Self-conjugate polyhedral Banach spaces,
* Bull. London Math. Soc.,*
18 (1986), 284-286.

J.R. Partington, Growth conditions on subharmonic functions
and resolvents of operators,
*Math. Proc. Camb. Philos. Soc.*, 97 (1985), 321-324.

J.R. Partington, Maximal norms on Banach spaces,
* Bull. London Math. Soc.,*
17 (1985), 55-56.

V.I. Istratescu and J.R. Partington, On nearly uniformly convex
and *k*-uniformly convex spaces,
*Math. Proc. Camb. Philos. Soc.*, 95 (1984), 325-327.

B. Bollobás and J.R. Partington, Inequalities for quadratic
polynomials in Hermitian and dissipative operators,
*Adv. Math.*, 51 (1984),
271-280.

J.R. Partington, On nearly uniformly convex Banach spaces,
*Math. Proc. Camb. Philos. Soc.*,
93 (1983), 127-129.
Corrigendum, *Ibid.*, 94 (1983), 189.

J.R. Partington, The resolvent of a Hermitian operator on a Banach
space,
* J. London Math. Soc.,*
(2) 27 (1983), 507-512.

J.R. Partington, Norm attaining operators,
*Israel J. Math.*, 43 (1982), 273-276.

J.R. Partington, Almost sure summability of subsequences in Banach
spaces,
*Studia Math.,* 71 (1982), 27-35.

J.R. Partington, Hadamard-Landau inequalities for uniformly convex
spaces,
*Math. Proc. Camb. Philos. Soc.*, 90 (1981), 259-264.

J.R. Partington, Subspaces of certain Banach sequence spaces,
* Bull. London Math. Soc.,*
13 (1981), 162-166.

J.R. Partington, Equivalent norms on spaces of bounded functions,
*Israel J. Math.*,
35 (1980), 205-209.

J.R. Partington, Constants relating a hermitian operator and its
square,
*Math. Proc. Camb. Philos. Soc.*, 85 (1979), 325-333.

J.R. Partington, Hermitian operators for absolute norms and absolute
direct sums,
*Linear Algebra and its Applications*,
23 (1979), 275-280.

J.R. Partington, On the Banach-Saks property,
*Math. Proc. Camb. Philos. Soc.*, 82 (1977), 369-374.