Kisoron-ml July 2016

2 participants
3 discussions

JAIST Logic Seminar Series
by Hajime Ishihara 20 Jul '16

20 Jul '16

皆様ルートヴィヒ・マクシミリアン大学ミュンヘンのHelmut Schwichtenberg先生の講演のお知らせです。どうぞふるってご参加ください。問合せ先：石原　哉北陸先端科学技術大学院大学情報科学系 e-mail: ishihara(a)jaist.ac.jp ----------------------------------------------- * JAIST Logic Seminar Series * * The seminar below is held as a part of JSPS Core-to-Core Program, A. Advanced Research Networks, and EU FP7 Marie Curie Actions IRSES project CORCON. (http://www.jaist.ac.jp/logic/ja/core2core, https://corcon.net/) Date: Thursday 25 August, 2016, 13:30-15:10 Place: JAIST, Lecture room I2 (Access: http://www.jaist.ac.jp/english/location/access.html) Speaker: Helmut Schwichtenberg (Ludwig-Maximilians-Universität München) Title: Invariance axioms for realizability Abstract: Kolmogorov (1932) proposed to consider mathematical formulas as problems asking for solutions. Following this idea it seems reasonable to extend arithmetical theories by adding invariance axioms, which state that every formula is equivalent to the (internal) formula stating that it has a realizer. We sketch such a theory, which in addition allows to fine-tune the computational content of proofs by decorations of the logical connectives. A soundness theorem holds.

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JAIST Logic Seminar Series
by Hajime Ishihara 19 Jul '16

19 Jul '16

皆様インスブリア大学のMarco Benini先生の講演のお知らせです。どうぞふるってご参加ください。問合せ先：石原　哉北陸先端科学技術大学院大学情報科学系 e-mail: ishihara(a)jaist.ac.jp ----------------------------------------------- * JAIST Logic Seminar Series * * The seminar below is held as a part of JSPS Core-to-Core Program, A. Advanced Research Networks, and EU FP7 Marie Curie Actions IRSES project CORCON. (http://www.jaist.ac.jp/logic/ja/core2core, https://corcon.net/) Date: Monday 8 August, 2016, 13:30-15:10 Place: JAIST, Collaboration room 7 (I-56) (Access: http://www.jaist.ac.jp/english/location/access.html) Speaker: Marco Benini (University of Insubria) Title: Variations on the Higman's Lemma Abstract: The Higman's Lemma says that if A is a well-quasi-order, so is the set of finite sequences over A with the order induced by embedding. By considering the structure of the categories of well-founded quasi-orders and well-quasi-orders, another proof of the Lemma will be derived, along with a number of variants, which may be of some interest.

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JAIST Logic Seminar Series (Thursday, 7th July 2016, 15:30-17:00, Ren-June Wang)
by Katsuhiko Sano 01 Jul '16

01 Jul '16

皆様台湾 National Chung Cheng University のRen-June Wangさんの講演会のお知らせです。どうぞふるってご参加ください。問合せ先：佐野勝彦北陸先端科学技術大学院大学情報科学系 e-mail: v-sano(a)jaist.ac.jp ----------------------------------------------------------------- * JAIST Logic Seminar Series * Date: Thursday, 7th July 2016, 15:30-17:00 Place: JAIST, IS school collaboration room 7, 5F (Access: http://www.jaist.ac.jp/english/top/access/index.html) Speaker: Ren-June Wang (Department of Philosophy, National Chung Cheng University) Title: Logical Omniscience and Deductive Rationality Abstract: Epistemic logic as an important tool for reasoning about an intellectual agent’s epistemic states has long suffered from the so-called logical omniscience problem since the beginning of its introduction. The problem indicates an idealized assumption on the part of the agent presented by a formalism of such kind. Although alternative epistemic formalisms have been proposed for dealing with the problem, there is no sight of that the problem is settled. Thus in this talk I will try my hand firstly to give an analysis of the problem, hopefully to pin down the source of the problem, and accordingly provide an advice as to what is the right direction of solving the problem. At the end of the talk I will suggest that what we need is not a formalism with a machinery that can limit what is known by the agent, but one with more powerful expressivity such that the resource that an agent will consume in the course of his/her reasoning, such as the temporal duration, can be explicitly stated. -- Katsuhiko Sano School of Information Science Japan Advanced Institute of Science and Technology IS building No.1 7F, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan

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