* registration is open * invited talks: Sara Negri, Edwin Brady, Jakob Rehof * 51 contributed talks CALL FOR PARTICIPATION 23rd International Conference on Types for Proofs and Programs, TYPES 2017 and EUTYPES Cost Action CA15123 meeting Budapest, Hungary, 29 May - 1 June 2017 http://types2017.elte.hu BACKGROUND The TYPES meetings are a forum to present new and on-going work in all aspects of type theory and its applications, especially in formalised and computer assisted reasoning and computer programming. The TYPES areas of interest include, but are not limited to: * foundations of type theory and constructive mathematics; * applications of type theory; * dependently typed programming; * industrial uses of type theory technology; * meta-theoretic studies of type systems; * proof assistants and proof technology; * automation in computer-assisted reasoning; * links between type theory and functional programming; * formalizing mathematics using type theory. FINANCIAL SUPPORT The first two days of TYPES 2017, May 29 - 30 are organised by EUTypes Cost Action CA15123 (https://eutypes.cs.ru.nl). On May 30 there will be an EUTypes Management Committee (MC) meeting, and on both days there will be WG meetings. This means that members of the EUTypes MC will be invited for these 2 days through the e-cost system, and their cost of travel and stay will be covered. There will likely be some funding for a limited number of other invited speakers. The funding is subject to COST rules, and invitations will be sent out via the e-cost system after the 1st of May. INVITED SPEAKERS * Edwin Brady (University of St Andrews): An Architecture for Dependently Typed Applications in Idris * Sara Negri (University of Helsinki): TBA * Jakob Rehof (TU Dortmund): Bounding Principles for Decision Problems with Intersection Types CONTRIBUTED TALKS 51 talks were accepted, see http://types2017.elte.hu/#accepted for the list of accepted papers and http://types2017.elte.hu/#programme for the programme. REGISTRATION Registration is open: http://types2017.elte.hu/#registration The early bird fee is 250 EUR + 30 EUR for the excursion (optional). Please register for the excursion because it is a great opportunity for discussion of research ideas in a relaxed environment and for general networking. For students, the early bird registration fee is 200 EUR. VENUE Budapest is the capital of Hungary with around two million inhabitants. The conference will be held at Eötvös Loránd University. Among the graduates of this university were John von Neumann and Paul Erdos. The conference dinner will take place during a boat cruise on the river Danube which separates the Buda and Pest parts of the city. PROGRAMME COMMITTEE * Andreas Abel (Chalmers University Gothenburg) * Thorsten Altenkirch (University of Nottingham) * José Espirito Santo (University of Minho) * Fredrik Nordvall Forsberg (University of Strathclyde) * Silvia Ghilezan (University of Novi Sad) * Hugo Herbelin (INRIA Paris-Rocquencourt) * Martin Hofmann (Ludwig Maximilian University of Munich) * Ambrus Kaposi (Eötvös Loránd University) (co-chair) * Tamás Kozsik (Eötvös Loránd University) (co-chair) * Assia Mahboubi (INRIA) * Alexandre Miquel (University of the Republic, Uruguay) * Leonardo de Moura (Microsoft Research, Redmond, USA) * Keiko Nakata (SAP, Potsdam) * Andrew Polonsky (University Paris Diderot) * Simona Ronchi Della Rocca (Università di Torino) * Aleksy Schubert (University of Warsaw) * Wouter Swierstra (Utrecht University) * Tarmo Uustalu (Tallinn University of Technology) CONTACT Email: info@types2017.elte.hu Organisers: Ambrus Kaposi, Tamás Kozsik, András Kovács and the Department of Programming Languages and Compilers at the Faculty of Informatics, Eötvös Loránd University, Budapest.