Tag Archives: logic

Celebrating World Logic Day at Swansea

Roger Hindley will give a talk on “100 Years of Combinatory Logic” on Friday, 22 January 2021 as a part of the World Logic Day celebration here in Swansea.

Time: Jan 22, 2021 10:00 AM London

Join Zoom Meeting by following this link.

Meeting ID: 965 2656 4560  Passcode: 411495

UNESCO proclaimed World Logic Day in 2019 in association with the International Council for Philosophy and Human Sciences (CIPSH), to enhance public understanding of logic and its implications for science, technology and innovation.

A complete list of WLD 2021 events can be found at http://www.wld.cipsh.international/wld.html.

Tonicha is speaking at UW-Madison logic seminar

Our PhD student, Tonicha Crook, is giving a talk at UW-Madison logic seminar today at 3pm.


The Weihrauch Degree of Finding Nash Equilibria in Multiplayer Games


Is there an algorithm that takes a game in normal form as input, and outputs a Nash equilibrium? If the payoffs are integers, the answer is yes, and a lot of work has been done in its computational complexity. If the payoffs are permitted to be real numbers, the answer is no, for continuity reasons. It is worthwhile to investigate the precise degree of non-computability (the Weihrauch degree), since knowing the degree entails what other approaches are available (eg, is there a randomized algorithm with positive success change?). The two player case has already been fully classified, but the multiplayer case remains open and is addressed here. As well as some insight into finding the roots of polynomials, which is essential in our research. An in-depth introduction to Weihrauch Reducibility will be included in the presentation, along with a small introduction to Game Theory.

Jan Bergstra visiting Swansea

We are glad to announce that Professor Jan A Bergstra, formerly Director of Informatics, University of Amsterdam, and chair of Informatics Section of Academia Europaea will be visiting Swansea University next week.

Meeting to commemorate the logician Erik Palmgren (1963-2019) on the occasion of the World Logic Day

We meet to remember the great logician Erik Palmgren who sadly passed away in November 2019 .

To honor Erik Palmgren’s work, Anton Setzer will give a talk with the title:

Palmgren’s interpretation of inductive definitions in type theory and development of  higher type universes in type theory.

The meeting also marks the 2nd World Logic Day.

Venue: Theory Lab (CoFo 209)

Time: 14th of January 2020, 2-3 pm

Visits and talks this week

This week we are glad to welcome two visitors here at Swansea, namely Hideki Tsuiki from Kyoto University and Kristijonas Čyra from the Imperial College of London.

Hideki will give a talk on “Infinite Adequacy Theorem through Coinductive Definitions” today at 14:00 as a part of our Theory seminar series and Kristijonas will speak on “Argumentation-enabled Explainable AI Applications” this Thursday at 15:00 at the CoFo.



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Ulrich Berger is currently attending the 3rd Workshop on Mathematical Logic and its Applications, Nancy, France, where he will present a talk on Extracting the Fan Functional.

Logic and Computational Complexity 2019

Monika Seisenberger (Swansea University) and Lauri Hella (Tampere University, Finland) is chairing the Twenteeth International Workshop on Logic and Computational Complexity (LLC’19), which will be held in Patras, Greece, on July 8, 2019, as part of ICALP.

More information is here: