
The Leeds Logic Group is one of the largest and most active in
Europe, with an international reputation for research in
several of the main areas of mathematical logic  computability
theory, model theory, set theory and foundations, proof theory,
and in applications to algebra, analysis and theoretical
computer science.
The group has been very successful in
obtaining EPSRC and EU support for Research Students and
PostDoctoral Fellows, and has been the focus of extensive
international collaboration via various
research projects and networks in proof theory,
computability theory and model theory. Our past postgraduates
and researchers
have been very successful in moving to research or teaching
positions in Mathematics and Computer Science departments
around the world.
Further details of individual staff's research interests can
be found on their homepages, accessed via the links
on the left. Applications to visit or to
pursue research within the Leeds Logic Group are always
welcome. We have a large, lively, and very international
community of faculty, research students and postdoctoral fellows.
For full information on how to
apply to do research in Pure Mathematics at Leeds,
please contact
the Pure Mathematics
Postgraduate Tutor, Prof.
Martin Speight.
NEWS

In memory of S. Barry Cooper, John Truss, Stan Wainer and Charles Harris are organising the meeting Directions in Computability Theory, which will be held on Saturday 17th September 2016 in the School of Mathematics at the University of Leeds.
This one day event is open to all interested in Logic and Computability, and also seeks to bring together those whom Barry influenced, or who were inspired by his work, and to remember the contributions that he made.
Further information can be found on the meeting page.

Professor S. Barry Cooper passed away on 26 October 2015. He was a key and influential member of the logic group in Leeds since 1969, championing the cause of computability theory and popular with staff and students alike. Here is the obituary that Richard Elwes, Andy LewisPye, Dugald Macpherson and Stan Wainer wrote for the London Mathematical Society.
Barry attended Chichester High School for Boys, and graduated from Oxford in 1966. He studied for a PhD, formally under R.L. Goodstein at Leicester, but worked mainly in Manchester with Mike Yates, the only established UK researcher in Barry's chosen field: the structuretheory of the Turing degrees. He was appointed Lecturer at the University of Leeds in 1969, where he remained, except for regular sabbaticals and invited visits abroad. He was awarded his Professorship in 1996.
By this time, the study of degree structures had matured into a mathematical discipline of great technical sophistication. Known for his deep, complex constructions, Barry played a prominent international role in this growth. He defined and intensively studied the jump classes, now objects of central importance. His theorem that every degree computably enumerable in and above 0' is the jump of a minimal degree, is regarded as a classic. He championed the study of the enumeration degrees, establishing many of their fundamental properties. In later years, Barry also became interested in the practical and philosophical significance of the limits of computability.
The year 2012 marked the centenary of the birth of Alan Turing, a celebration which Barry led with boundless energy, and which did much to bring Turing the public recognition he deserves. Barry became the event's media spokesman and chaired a 6month programme on Semantics and Syntax at the Isaac Newton Institute. His edited volume with Jan van Leeuwen: "Alan Turing: His Work and Impact" (2013) later won the Association of American Publishers' RR Hawkins Award.
Popular with undergraduates as an outstanding and charismatic teacher, Barry supervised many successful PhD students, and was founder and president of "Computability in Europe", a flourishing association that now has more than 1,000 members. He was awarded an Honorary Degree from Sofia University in 2011.
Beyond mathematics, Barry played rugby for England under16s and became a keen long distance runner, with a personal best marathon time of 2hr 48min. He cofounded the Leeds Jazz nonprofit organisation in 1984, and was involved in numerous political campaigns, notably the Chile Solidarity Campaign for refugees from 1973.
Barry is survived by his wife, Kate, and their sons Evan and Mark, and by his daughters Carrie and Shirin with his former partner Sue Buckle.

The
2016 Löb Lecturer is Professor
Dana S Scott,
ACM Turing Award Laureate, 1976. Other honours awarded Prof Scott during his
distiguished career include the Rolf Schock Prize in Logic and Philosophy (Royal Swedish Academy of Sciences, 1997), and the Bolzano Medal for Merit in the Mathematical Sciences (Czech Academy of Sciences, 2001).
The Löb Lecture, given by Professor Dana Scott, will take place on Wednesday 18th May in the Leeds Roger Stevens Lecture Theatre 24 at 16.30. This will be part of a UK lecture tour, taking in Oxford, Birmingham, Leeds, Cambridge and London.
Slides are now available from Dana Scott's Löb Lecture Why Mathematical Proof? and Logic Seminar Types and TypeFree λCalculus.

The
Leeds Logic Group,
with support from the
University of Leeds
will host the
2016
Association of Symbolic Logic European Summer Meeting: Logic
Colloquium '16, July 31  August 6, 2016.
The Programme Committee members are: M. Bodirsky, S. Buss,
N. Gambino, R. Iemhoff (Chair), H. Leitgeb, S. Lempp, M. Malliaris, R. Schindler,
and Y. Venema.
The Local Organizing Committee includes:
O. Beyersdorff, S.B. Cooper, N. Gambino (Chair), I. Halupczok,
H.D. Macpherson, V. Mantova, M. Rathjen, J.K. Truss, and S.S. Wainer.
Further information to follow soon. Abstracts of contributed talks submitted by
ASL members will be published in The Bulletin of Symbolic Logic if they
satisfy the basic ASL Rules for Abstracts.

Leeds logician
Peter
Schuster, who has moved to Verona, has coordinated
a successful
MarieCurie International Research Staff Exchange Scheme (IRSES) EU
proposal
entitled Correctness by
Construction.
Starting 1 January 2014, the project will run for four years,
with a total
budget of EUR 285600. The project will fund secondments of staff
members from EU institutions (such as Univ. of Leeds) to outside the EU.
Further participants in Leeds
are Michael Rathjen, Nicola Gambino, John Stell, and Olaf Beyersdorff (the last two from
Computing); UK partners are Swansea and Strathclyde (both Computer
Science); EU partners are Stockholm, Siegen, Munich, Insubria, Genoa,
Padua; nonEU partners are from India, Korea, Japan, New Zealand,
Australia, and the US.
This is supplemented by
a 30month research grant
Abstract Mathematics for Actual
Computation: Hilbert's Program for
the 21st Century
for GBP 304,070 funded by the John Templeton Foundation,
with Leeds participants Peter Schuster,
Michael Rathjen, Nicola Gambino, Olaf Beyersdorff (from Computing)
and (from Insubria, Italy) Marco Benini.
Other recent Logic Group successes include an EPSRC grant with PI Nicola Gambino:
'Homotopy Type Theory: Programming and Verification' (20152019); and
another with PI Dugald MacPherson: 'Definable sets and measures in finite,
pseudofinite, and profinite structures', running until August 2016.

Professor
Michael Rathjen has been awarded a 3year research grant
worth GBP 283,814
by EPSRC
to investigate further the connections between type theory and homotopy
theory, which lie at the heart of Voevodsky's Univalence Foundations
programme.
One of the goals of the project is to clarify the logical status
of the Univalence Axiom, a new axiom introduced by Voevodsky, which plays an
important role in the development of homotopy theory within type theory.
Dr
Nicola Gambino has
been awarded a 3year research grant worth USD 359,397.00 by the US Air Force
Office for Scientific Research
to work on the connections between type
theory and homotopy theory.
The general goal of the project is to improve
our understanding of these connections using the language of homotopical
algebra and higherdimensional category theory,
with particular emphasis on
forms of inductive types suggested by homotopy theory and on the
newlyintroduced higherinductive types.

Professor
Barry Cooper was awarded a 3year research grant
worth GBP 669,850 by the John Templeton Foundation,
to fund a research project
Mind, Mechanism and Mathematics.
Running July 2012  June 2015, the project supported six Turing
Research Fellows and three Turing Scholars, from Princeton,
Harvard, Sussex, Cambridge, Wellington NZ, Nijmegen, Caltech
and Nice  and was centred around 4 related research themes: The Mathematics
of Emergence; Intelligent Machines, Practice and Theory; Information,
Complexity and Randomness; and New Models of Logic and Computation.
The
First Project Workshop was colocated with
Computability in Europe 2013 in Milan, and the Second
will be at
Columbia University, NYC.
Hear
Professor Cooper and Baroness Trumpington
interviewed by John Humphrys on the BBC Today Programme,
concerning the Royal Pardon granted to mathematician Alan
Turing on December 24, 2013. And
Sky TV News interview.

The Leeds Logic Group saw a number of new arrivals in 2013.
These included:
Associate Professor
Nicola Gambino 
previously working as a research fellow in proof theory at Leeds with Michael Rathjen
Dr Immi Halupczok
with interests related to model theory,
arrived from Münster in Germany
to take up a lectureship at Leeds, and
Dr Will Anscombe arrived from Oxford in September as a research fellow on
a model theory project with Dugald MacPherson.

A major outcome of the Turing centenary
is the publication by Elsevier of
Alan Turing: His Work and Impact,
edited by Barry Cooper from Leeds and Jan van Leeuwen from
Utrecht University.

The
British Logic Colloquium (BLC) 2013 will be held at the University of Leeds
from the 5th to the 7th of September 2013, together with a:
Dummett Symposium
 4th to 5th September 2013  in memory of Sir Michael A E Dummett
FBA DLitt (19252011).
It is expected that there will also be a
BLC Postgraduate logic meeting (3rd4th September 2013).


John with Anita Burdman and Sol Feferman, and Michael Rathjen,
after the 2008 Löb Lecture in Leeds.

JOHN DERRICK MEMORIAL EVENT,
30th January, 2013:
A special series of talks will be delivered on Wednesday January 30th
in memory of
John Derrick.
All talks are to take place in the MALL, Level 8 of the School of Mathematics, University of Leeds, Leeds LS2 9JT.
The schedule for the afternoon is as follows:
 14:4515:00 Frank Drake:
Reminiscences of John Derrick.
 15:0015:45 Michael Rathjen: Provability and Unprovability.
 15:4516:00 tea (Senior common room)
 16:0016:20 John Derrick Jr. (Sheffield): Correct concurrent algorithms.
 16:3017:15 Nicola Gambino (Palermo & Leeds): Bicategories of bimodules.
 Dinner at the Red Chilli Restaurant 18:00. Please let
Michael Rathjen [M.Rathjen @ leeds.ac.uk] know if you are coming for dinner.

The 2012
Löb Lecturer is Professor Angus
Macintyre FRS of Queen Mary, University of London.
Prof. Macintyre was awarded the Pólya Prize in 2003, and
became President of the London Mathematical Society
in 2009.
Prof. Macintyre is a worldleading logician, and an engrossing speaker
who has a wide engagement with mathematics. He gave
a timely
2011 Gresham Lecture on
Undecidable and Decidable Problems in Mathematics:
A survey and some reflections, for the
centenary of Turing's birth (click to see a video online).

On June 23rd, 1912,
Alan Turing
was born in London, and went on to have a huge impact on logic, computing,
cryptography and artificial intelligence.
Barry Cooper
from Leeds, an academic descendent of Turing, chairs
the Turing Centenary Advisory
Committee (TCAC), which will coordinate the
Alan Turing Year
celebrating this unique anniversary. Prof. Cooper is also a coorganiser
of the Isaac Newton Institute for Mathematical Sciences 6month programme
on Semantics and Syntax:
A Legacy of Alan Turing,
9 January  6 July 2012 in Cambridge.
And (with Leeds alumnus Mariya Soskova) he cochairs the INI workshop
THE INCOMPUTABLE
at the Kavli Royal Society International Centre
Chicheley Hall, 12  15 June, 2012. He is Chair of the jury for the
Turing
Centenary Research Fellowship and Scholar Competition (with honorary
chairs Sir Roger Penrose and Rodney Brooks).
A book:
The Once and Future
Turing  Computing the World,
coedited with Turing's biographer
Andrew Hodges, is
in preparation; and a book of Turing's works, with commentaries by leading experts,
coedited with
Jan van Leeuwen for Elsevier:
Alan Turing  His Work and Impact.

The Leeds Logic Group mourns the passing of John Derrick, a remarkable and much loved member 
here is Garth Dales (an 'honorary logician') writing on John for the London Mathematical Society:
John Derrick, former Lecturer in the Department of Pure Mathematics at the University of Leeds,
died on 8 December 2011. John was born in Paris in 1935, left for England at the outbreak of
war with his family on 'the last boat out of Biarritz', and later attended Caterham School in Surrey
as a boarder. He read Mathematics at University College London, and, after graduating in 1956,
completed teachertraining at the London University Institute of Education. He taught at
Ottershaw School, where he was given responsibility for the whole of mathematics teaching in the Sixth Form.
At the beginning of 1963, John took up a lectureship at Leeds. He was a lively member of the growing
group of mathematical logicians led by M.H. Löb. His interest in Set Theory led him into fruitful
collaboration with colleagues in mathematics and in philosophy. Later, his interests focused on
computerassisted proof, and he became Deputy Director of the Leeds Centre for Theoretical Computer
Science in 1992. John was a dedicated teacher, spending much time with students.
John was involved in a wide range of extramural activities, serving as President of the Yorkshire
Branch of the Mathematical Association 196869.
He travelled extensively to logic conferences and made many friends, revelling
especially in 'adventures' to Eastern Europe during the 1960s and 1970s.
Between October 1970 and March 1972 he was an Associate Professor at the University of Orléans.
Following some years of illhealth, John took early retirement in July 1998. He is survived
by his wife Margaret, daughter Cathy, son John (now Professor of Computer Science in Sheffield), and
three grandchildren.

On 27th October 2011, Prof. Barry Cooper
received an Honorary Degree (Degree Honoris Causa) at Sofia University, Bulgaria, where he
gave an academic lecture entitled Computing in an Incomputable World.
Barry also gave the 2011 Courtauld Lecture
of the Manchester Literary and Philosophical
Society (founded in 1781)
to an audience of over 350 at the Northern College of Music, February 10, 2011.
The title of his talk was
The
Incomputable Alan Turing.

Maths 1001:
Absolutely Everything That Matters
in Mathematics is a
new book written by Leeds Logic Group
alumnus and Visiting Fellow Richard Elwes.
Richard has a new book,
How to Build a Brain: And 34
Other Really Interesting Uses of Mathematics came out
in 2011.
See also
Large cardinals: maths shaken by the 'unprovable'.

Leeds Symposium on
Proof Theory and Constructivism, 316 July 2009, included a
Conference on Proofs and Computations in honour of
Stan
Wainer's 65th
birthday, and a Gentzen Centenary Conference, celebrating the birth of
Gerhard
Gentzen, founder of structural proof theory.
The Leeds Algebra and Logic Group has been selected as a
University
Gold
Peak of Excellence, in recognition of its worldleading
research and its international renown.

The 2008
Löb Lecturer was
Professor Solomon
Feferman from
Stanford University. An exstudent of Alfred Tarski, Sol Feferman received the
Rolf Schock Prize in Logic and Philosophy for 2003, is an exPresident
of the ASL, and is EditorinChief of the Gödel Collected
Works.
Anita Burdman Feferman, author of From Trotsky to Gödel:
The Life of Jean Van Heijenoort, and (with Sol)
Alfred Tarski: Life
and Logic
gave a fascinating talk on Tarski before the Löb Lecture.
Some photos from the two lectures,
thanks to Bahareh Afshari.

Martin Löb, a central figure in the development of
CMathematical Logic in the UK, and founder of the
Leeds Logic Group, has died in Holland at the age of 85.
For an account of his life and work, see the
Guardian Obituary by Stan Wainer,
or this Amsterdam webpage.

MATHLOGAPS 
the EU Marie Curie EST project,
Mathematical Logic
and Applications,
involving Leeds, Lyon, Munich and
Manchester, recently finished. Its successor,
starting in 2009, is the
Marie Curie ITN project
MALOA, also
coordinated from Leeds by
Dugald
Macpherson.
Leeds was a main
participant in
the Marie Curie model theory network
MODNET, 200508.

Barry
Cooper has been elected President of the
Association Computability in Europe. CiE conferences held include
CiE
2005 in Amsterdam,
CiE
2006 in Swansea,
CiE
2007 in Siena,
CiE
2008 in Athens,
CiE
2009 in Heidelberg, and
CiE
2010 in Ponta Delgada, the Azores, Portugal.
CiE
2011 was in Sofia, Bulgaria.


