ACT Adjoint School

The Adjoint School at the ACT conference introduces early career researchers to applied category theory.

Adjoint School 2018

Open Petri nets, mentored by John Baez

Logic of causality, mentored by Aleks Kissinger

Compositional linguistics, mentored by Martha Lewis

  • Coecke, Sadrzadeh, Clark, 2010: Mathemical foundations for a compositional distributional model of meaning (arxiv, Azimuth , nCat Cafe )
  • Bolt, Coecke, et al, 2017: Interacting conceptual spaces I: Grammatical composition of concepts (arxiv, Azimuth , nCat Cafe )

Open and interconnected systems, mentored by Pawel Sobocinski

Adjoint School 2019

ZX-calculus, mentored by Miriam Backens

  • Amy, Chen, Ross, 2017: A finite presentation of CNOT-dihedral operators (doi, arxiv, nCat Cafe )
  • Backens, 2014: The ZX-calculus is complete for stabilizer quantum mechanics (doi, arxiv, nCat Cafe )

Partial evaluations, mentored by Tobias Fritz

  • Fritz & Perrone, 2018: Monads, partial evaluations, and rewriting (arxiv, slides, nCat Cafe )
  • Clementino, Hofmann, Janelidze, 2014: The monads of classical algebra are seldom weakly cartesian (doi, nCat Cafe )
  • Trimble, blog post: On the bar construction (1 ,2 )

Turing categories, mentored by Pieter Hofstra

  • Cockett & Hofstra, 2008: Introduction to Turing categories (doi, nCat Cafe )
  • Cockett, Hofstra, Hrubeš, 2014: Total maps of Turing categories (doi, nCat Cafe )
  • Joyal, Street, Verity, 1996: Traced monoidal categories (doi)

Optics and profunctors , mentored by Bartosz Milewski

  • Pastro & Street, 2018: Doubles for monoidal categories (pdf, nCat Cafe )

Categorical language models, mentored by Mehrnoosh Sadrzadeh

  • Jaeger, 1998: A multi-modal analysis of anaphora and ellipsis (pdf)
  • Purver, Cann, Kempson, 2006: Grammars as parsers: Meeting the dialogue challenge (doi, pdf, nCat Cafe )

Mathematics of autopoiesis , mentored by David Spivak

  • Fong, Myers, Spivak, 2018: Behavioral mereology (arxiv, nCat Cafe )
  • Fong & Spivak, 2019: Graphical regular logic (arxiv, nCat Cafe )
  • Luhmann, 2018. Organization and decision (doi)

Adjoint School 2020

Dialectica categories of Petri nets, mentored by Valeria de Paiva

  • Brown & Gurr, 1990: A categorical linear framework for Petri nets (doi, Azimuth , nCat Cafe )
    • Journal version: Brown & Gurr, 1995: A categorical linear framework for Petri nets (doi)
  • de Paiva, 1991: Categorical multirelations, linear logic, and Petri nets (doi, pdf)

Type theory for SMCs, mentored by Michael Shulman

  • Shulman, 2021: A practical type theory for symmetric monoidal categories (pdf, arxiv, nCat Cafe )
  • Schommer-Pries, 2011: The classification of two-dimensional extended topological field theories (arxiv)

Categories of maintainable relations, mentored by Michael Johnson

  • Johnson & Rosebrugh, 2016: Unifying set-based, delta-based and edit-based lenses (pdf)
  • Clarke, 2019: Internal lenses as functors and cofunctors (arxiv)

Distances between persistence modules, mentored by Nina Otter

  • Bubenik, Scott, Stanley, 2018: Exact weights, path metrics, and algebraic Wasserstein distances (arxiv)
  • Harrington, Otter, Schenck, Tillmann, 2019: Stratifying multiparameter persistent homology (doi, arxiv)

Adjoint School 2021

Computing with C-sets, mentored by James Fairbanks and Evan Patterson

  • Fong, 2015: Decorated cospans (pdf, arxiv, nCat Cafe 1 ,2 ,3 )
  • Vagner, Spivak, Lerman, 2015: Algebras of open dynamical systems on the operad of wiring diagrams (pdf, arxiv)

Enriched profunctor nuclei, mentored by Simon Willerton

  • Willerton, 2015: The Legendre-Fenchel transform from a category theoretic perspective (arxiv)
  • Elliot, 2017, PhD thesis: On the fuzzy concept complex (pdf), Chapters 2-3

Double categories in ACT, mentored by Simona Paoli

  • Baez & Courser, 2019: Structured cospans(pdf, arxiv)
  • Paoli & Pronk, 2013: A double categorical model of weak 2-categories (pdf, nCat Cafe )
  • Paoli, 2019: Simplicial methods for higher categories (doi)

Coalgebraic dynamic logic, mentored by Helle Hvid Hanse and Clemes Kupke

  • Rutten 2000: Universal coalgebra: a theory of systems (doi, nCat Cafe )
  • Kupke & Pattinson, 2011: Coalgebraic semantics of modal logics: An overview (doi)
  • Hansen, Kupke, Leal, 2014: Strong completeness for iteration-free coalgebraic dynamic logics (doi)

Adjoint School 2022

Compositional thermostatics, mentored by Spencer Breiner and Joe Moeller

  • Baez, Lynch, Moeller, 2021: Compositional thermostatics (arxiv, nCat Cafe )
  • Lawvere, 1984: State categories, closed categories, and the existence of semi-continuous entropy functions (pdf)

Fuzzy type theory for opinion dynamics, mentored by Paige North

  • Grayson, 2018: An introduction to univalent foundations for mathematicians (doi, nCat Cafe )
  • Hansen & Ghrist, 2021: Opinion dynamics on discourse sheaves (doi, arxiv, nCat Cafe )

Compositional timed and probabilistic processes, mentored by Nicoletta Sabadini

  • Albasini, Sabadini, Walters, 2011: The compositional construction of Markov processes (nCat cafe )
  • Cherubini, Sabadini, Walters, 2004: Timing in the cospan-span model (doi, nCat Cafe )

Algebraic structures in logic and relations, mentored by Filippo Bonchi

  • Carboni & Walters, 1987: Cartesian bicategories I (doi)
  • Bonchi, Seeber, Sobocinski, 2018: Graphical conjunctive queries (doi, arxiv)
  • Bonchi, Pavlovic, Sobocinksi, 2017: Functorial semantics for relational theories (arxiv, nCat Cafe )