TACL 2026

Topology, Algebra, and Categories in Logic

 13 - 17 July 2026

 Kraków, Poland


Summer School in Logic

 6 - 10 July 2026

 Kraków, Poland

About the conference

Studying logics via semantics is a well-established and very active branch of mathematical logic, with many applications, in computer science, philosophy, and elsewhere. The area is characterized by results, tools and techniques stemming from various fields, including universal algebra, topology, category theory, order, and model theory. The programme of the conference TACL 2024 will focus on three interconnecting mathematical themes central to the semantic study of logics and their applications: algebraic, categorical, and topological methods. This is the 12th conference in the series Topology, Algebra and Categories in Logic (TACL, formerly TANCL), of which a complete website can be found here. Earlier installments of this conference have been organized in Tbilisi (2003), Barcelona (2005), Oxford (2007), Amsterdam (2009), Marseille (2011), Nashville (2013), Ischia (2015), Prague (2017), Nice (2019), Coimbra (2022), and Barcelona (2024).

Topics

Contributed talks in any topic dealing with the use of algebraic, categorical or topological methods in either logic or computer science are welcomed. This includes, but is not limited to, the following areas:

• Algebraic structures in CS
• Lattices with operators
• Proofs and types
• Algebraic logic
• Modal logics
• Residuated structures
• Coalgebra
• Non-classical logics
• Semantics
• Categorical methods in logic
• Ordered topological spaces
• Stone-type dualities
• Domain theory
• Ordered algebraic structures
• Substructural logics
• Fuzzy and many-valued logics
• Pointfree topology
• Topological semantics of modal logic
• Lattice theory
Students that are members of the Association for Symbolic Logic (ASL) can apply for ASL travel funds. Note that in order to be considered, applications must be received by the ASL three months prior to the start of the conference.
See https://aslonline.org/membership/individual-membership/ for more info and instructions on how to apply.

Important Dates

Abstract submission deadline 23 February 2026
Notification of acceptance 20 April 2026
Early registration deadline 31 May 2026
Registration deadline 30 June 2026
Summer school 6 - 10 July 2026
Conference 13 - 17 July 2026

Invited speakers

Speaker

Fréderic Chopin

Title
Affiliation
Speaker

Józef Elsner

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Speaker

Henryk Wieniawski

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Mieczysław Karłowicz

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Maria Szymanowska

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Karol Kurpiński

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Juliusz Zarębski

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Venue

Address

Larisch Palace
ul. Bracka 12, 31-005 Kraków, Poland

Info

will be added here later on

Steering Committee

  • Guram Bezhanishvili, New Mexico State University, USA
  • Mai Gehrke, Université Côte d’Azur, Nice, France
  • Silvio Ghilardi, Università degli Studi di Milano, Italy
  • Ramon Jansana, University of Barcelona, Spain
  • Hilary Priestley, University of Oxford, UK
  • James Raftery, University of Pretoria, South Africa
  • Yde Venema, University of Amsterdam, Netherlands

Program Committee

  • Nick Bezhanishvili (co-Chair), ILLC - University of Amsterdam
  • Nick Galatos (co-Chair), University of Denver

Contributed Talks

In addition to invited one-hour talks there will be 30 minute contributed talks (25 min talk duration + 5 min questions resp. break). Authors can submit an Extended Abstract of 2 pages (including references) at the EasyChair conference system: TBA

Registration Fees

TACL standard€350
TACL standard, early€300
TACL reduced€250
TACL + School (for students)€300
School only€150

Important Deadlines

Abstract Submission ends23 Feb 2026
Notification of acceptance20 Apr 2026
Early Registration Ends31 May 2026
Registration Ends30 June 2026

Social Events

Banquet

Date: TBA, 2026

Time: TBA

Location: TBA

Free afternoon + Social events

Date: TBA 2026

Explore Kraków on your own or join an organized tour to the famous Wieliczka Salt Mine or the historic Wawel Castle.

Conference Dinner

Date: TBA 2026

Time: TBA

Location: Wieliczka Salt Mine

Summer School in Logic

 6 - 10 July 2026

 TBA

Tutorials:

→ Homotopy Type Theory

→ Artificial Intelligence and Logic

→ Algebraic Methods in Constraint Satisfaction

→ Residuated Lattices and Substructural Logics

Lecturers

Speaker

Adam Mickiewicz

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Henryk Sienkiewicz

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Stanisław Lem

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Speaker

Czesław Miłosz

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Affiliation

Venue of the School

Address

TBA
TBA Kraków, Poland

By Plane

BLA BLA

By Bus

BLA BLA

By Train

BLA BLA

By Car

BLA BLA

Accommodation

BLA BLA, the site provides hotel

Organizers


Zalan Gyenis

Zalán Gyenis

Tomasz Kowalski

Tomasz Kowalski

Piotr Lukowski

Piotr Łukowski

Katarzyna Słomczyńska

Katarzyna Słomczyńska

Marek Zaionc

Marek Zaionc

Sponsors


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Konferencja została dofinansowana ze środków Programu Strategicznego
„Inicjatywa Doskonałości – Uczelnia Badawcza”
realizowanego na Wydziale Filozoficznym Uniwersytetu Jagiellońskiego