## Section: Dissemination

### Promoting Scientific Activities

#### Scientific Events Organisation

##### General Chair, Scientific Chair

Pierre-Louis Curien is organising a Day of Hommage to the memory of Maurice Nivat on Fevruary 6, 2018, at University Paris 7.

##### Member of the Organising Committees

Yann Régis-Gianas was multimedia chair of the organising committee of POPL 2017 that took place in Paris in January 2017.

Yves Guiraud, Philippe Malbos and Samuel Mimram have organised the third edition of the Higher-Dimensional Rewriting and Algebra (HDRA) workshop of the Formal Structures for Computation and Deduction conference (FSCD), held in Oxford in September 2017.

Yves Guiraud and Samuel Mimram, with Dimitri Ara (Univ. Aix-Marseille) have organised the “Categories in Homotopy and Rewriting” one-week international conference, at the CIRM, in Marseille, in September 2017. As the closing conference of the Cathre ANR project, focused on higher-dimensional algebra, this conference attracted 80 participants, working in category theory, algebraic topology, logic and theoretical computer science.

Matthieu Sozeau co-organised with Nicolas Tabareau the 3rd Coq Implementors Workshop in Le Croisic, France, June 12-16 2017. It included presentations from developers, both from France and abroad and a large amount of hacking.

#### Scientific Events Selection

##### Member of the Conference Program Committees

Hugo Herbelin was a member of the program committees of the conference FSCD'17, of the TYPES'17 venue, as well as of the PxTP'17 and CoqPL'18 workshops.

Matthieu Sozeau was member of the program committee of CoqPL'17.

Yann Régis-Gianas was member of the program committee of JFLA'18.

Alexis Saurin was a member of the program committee of the workshop Coinduction in Type Theory which took place in Chambéry from the 3rd to the 6th of July, 2017

Alexis Saurin was a member of the program committee of the workshop on Trends in Linear Logic and Applications which took place in Oxford on the 3rd of September 2017 as a satellite event of FSCD conference.

##### Member of the Conference Steering Committees

Hugo Herbelin was a member of the steering committee of the conference *Formal Structures for Computation and Deduction* (FSCD) until September 2017.

Hugo Herbelin is a member of the steering committee of the conference *TYPES*.

Pierre-Louis Curien is member of the steering committee of the international workshop Games for Logic and Programming Languages (GaLop).

Matthieu Sozeau is member of the steering committee of the Dependently Typed Programming international workshop (DTP).

#### Journal

##### Member of the Editorial Boards

Pierre-Louis Curien is editor in chief of the Cambridge University Press journal Mathematical Structures in Computer Science (since January 2016).

Alexis Saurin is editing a special issue of MSCS dedicated to contributions in honour of Dale Miller for his 60th birthday.

##### Reviewer - Reviewing Activities

The members of the team reviewed papers for numerous journals and international conferences.

#### Invited Talks

Pierre-Louis Curien gave an invited talk at the Conference Categories for Homotopy Theory and Rewriting on “A syntactic approach to polynomial functors, polynomial monads and opetopes” (September 2017).

Yann Régis-Gianas gave an invited talk at the Conference for Trends in Functional Programming In Education on the OCaml MOOC (April 2017).

#### Scientific Expertise

Pierre-Louis Curien and Yves Guiraud have been members of the “Comité de sélection” for an assistant professor position in mathematical foundations of computer science at the University Paris 7 (spring 2017).

#### Research Administration

Pierre-Louis Curien, Hugo Herbelin and Yves Guiraud are members of the scientific council of the Computer Science deparment of University Paris 7.

Yves Guiraud is the head of the “Preuves, Programmes and Systèmes (PPS)” pole of the IRIF laboratory (since April 2016), a member of the IRIF council (January 2016 - December 2017), and of the IRIF direction council (since September 2017).

Pierre-Louis Curien is a member of the Scientific Council of the CIRM (Centre International de Rencontres Mathématiques.

#### Presentation of papers

Hugo Herbelin gave a talk at the GT Geocal-Lac on a proof of Gödel's completeness theorem using side-effects.

Hugo Herbelin gave a talk at the PPS pole days on the intuitionistic reverse mathematics properties of Gödel's completeness theorem.

Étienne Miquey gave a talk at the ESOP conference in Uppsala (Sweden) on “A classical sequent calculus with dependent types” (April 2017).

Jovana Obradović gave a talk at the Conference Topology in Ecuador (Galapagos Islands) on “Categorified cyclic operads” (August 2017).

Théo Zimmermann gave a talk on Coq's Prolog and application to defining semi-automatic tactics at the TTT'17 workshop (Type-Theory Based Tools).

Cyprien Mangin gave a talk on Equations at the TTT'17 workshop.

Matthieu Sozeau gave a talk on Coq 8.6 at the CoqPL'17 workshop in January 2017.

#### Talks in seminars

Pierre-Louis Curien gave talks at NII (Hasuo's Lab, Tokyo) and at Shanghai Jiaotong University on “Trialgebraic structures on faces of some families of polytopes” (October-November 2017).

Théo Zimmermann gave a talk on transfer of isomorphisms at the Deducteam seminar (April 2017).

#### Attendance to conferences, workshops, schools,...

Hugo Herbelin attended TTT'17, TYPES'17 and FSCD'17.

Cyrille Chenavier, Maxime Lucas, Philippe Malbos and Samuel Mimram attended the HDRA workshop in Oxford (September 2017).

Cyrille Chenavier, Pierre-Louis Curien, Yves Guiraud, Maxime Lucas, Philippe Malbos and Samuel Mimram attended the “Categories in Homotopy and Rewriting” conference in Marseille (September 2017).

Hugo Herbelin attended the conferences Types 2017 in Budapest (Hungaria, May), the Coq implementors workshop in Le Croisic (June), the FSCD conference in Oxford (UK, September). He attended various workshops of the POPL'17 and FSCD'17 conference, including TTT'17 and CoqPL'17. He participated to the Big Proofs seminar in Cambridge (July).

Jean-Jacques Lévy participated to CAV and VSTTE 2017 conferences, Heidelberg, Germany, July 21-28 where his co-author Ran Chen presented the article [37].

Matthieu Sozeau attended POPL'17, CPP'17 and CoqPL'17 in Paris (January), TYPES'17 in Budapest (Hungaria, May) and the Coq implementors workshop in Le Croisic (June).

Étienne Miquey attended the conference ESOP in Uppsala (Sweden) in April 2017.

Pierre-Louis Curien and Jovana Obradović attended the conference Topology in Ecuador (Galapagos Islands) in August 2017, and the conference Geometry and combinatorics of associativity in Dublin in October 2017.

Pierre-Louis Curien and Claudia Faggian attended the CRECOGI meeting in Ito (Japan), and Claudia Faggian gave a talk on “Proof techniques in Probabilistic Reduction Systems” (November 2017).

Théo Zimmermann attended the TTT'17 workshop (January 2017) and the Coq implementors workshop in Le Croisic (June 2017).

#### Groupe de travail Théorie des types et réalisabilité

This is one of the working groups of PPS, jointly organised by Hugo Herbelin and Matthieu Sozeau.

The speakers in 2017 were Pierre-Marie Pédrot, Guilhem Jaber, Francesco A. Genco, Ludovic Patey.

#### Groupe de travail Catégories supérieures, polygraphes et homotopie

Several members of the team participate actively in this weekly working group of PPS, organised by François Métayer (IRIF) since 2009.