皆様
ジーゲン大学のDieter Spreen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 情報科学研究科
e-mail: ishihara(a)jaist.ac.jp
-----------------------------------------------
* JAIST Logic Seminar Series *
* This seminar is held as a part of JSPS Core-to-Core Program,
A. Advanced Research Networks, and EU FP7 Marie Curie Actions
IRSES project COMPUTAL (http://computal.uni-trier.de/).
Date: Thursday 7 May, 2015, 13:30-15:00
Place: JAIST, Collaboration room 6 (I-57g)
(Access: http://www.jaist.ac.jp/english/location/access.html)
Speaker: Dieter Spreen (University of Siegen)
Title: Digit Spaces - Topological Foundations
Abstract:
Digit spaces have been introduced by Ulrich Berger as a framework for
extracting programs that deal with continuous data from formal proofs.
The essential idea was to represent objects as streams of unary
contractions on a complete metric space and to use coinduction on the
logical side.
In recent joint work on an extension of this approach to hyperspaces
like the space of nonempty compact subsets of a digit space,
it turned out that compact cannot be represented by such streams in
general: instead one has to deal with infinite trees the nodes of which
are labeled by
contraction similar to the stream case.
It was realized, however, that one will obtain a uniform theory, if the
contractions, also called digits, are allowed to be multi-ary.
皆様
トリア大学のNorbert Mueller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 情報科学研究科
e-mail: ishihara(a)jaist.ac.jp
-----------------------------------------------
* JAIST Logic Seminar Series *
* This seminar is held as a part of JSPS Core-to-Core Program,
A. Advanced Research Networks, and EU FP7 Marie Curie Actions
IRSES project COMPUTAL (http://computal.uni-trier.de/).
Date: Tuesday 25 August, 2015, 15:10-16:40
Place: JAIST, Collaboration room 6 (I-57g)
(Access: http://www.jaist.ac.jp/english/location/access.html)
Speaker: Norbert Mueller (University of Trier)
Title: Real numbers and computers
Abstract:
Sometimes, people think that computers could compute correctly.
Unfortunately,
this is not true in general: Overflows, underflows, rounding errors and
truncation errors can lead to grossly wrong results, even if the used
algorithm is implemented with care. This can often be traced down to use of
"double precision numbers" as a replacement for the "real numbers".
In the talk we present how a computer can compute more precisely or even
"exact", just using basic concepts of object-oriented programming.
Additionally, we present some of the basic ideas that are used to get an
efficient implementation of exact real arithmetic.
皆様、
北陸先端大の横山です。
参加登録期限が近づきましたので、研究集会
Computability Theory and Foundations of Mathematics 2015
(2015年9月7日(月)~9月11日(金),東京工業大学大岡山キャンパス)
の情報を再送致します。
なお、研究集会のプログラムが
http://www.jaist.ac.jp/CTFM/CTFM2015/timetable.html
にアップされております。
横山啓太
---------- Forwarded message ----------
皆様、
北陸先端大の横山です。
以下の要領で研究集会
Computability Theory and Foundations of Mathematics 2015
(2015年9月7日(月)~9月11日(金),東京工業大学大岡山キャンパス)
を開催いたします.
詳しい情報については、下記のホームページをご覧ください。
http://www.jaist.ac.jp/CTFM/CTFM2015/index.html
本研究集会では、田中一之先生の還暦を記念して、田中先生の研究にちなんだセッションも行う予定です。
現在、参加登録を受付中です。参加登録の締め切りは8月21日となります。
宜しくご参加をご検討ください。
============================================================
Computability Theory and Foundations of Mathematics
(Tokyo Institute of Technology, Tokyo, Japan, September 7-11, 2015)
http://www.jaist.ac.jp/CTFM/CTFM2015/index.html
============================================================
Computability Theory and Foundations of Mathematics (CTFM) aims to
develop computability theory and logical foundations of Mathematics.
The scope involves the topics Computability Theory, Reverse
Mathematics, Nonstandard Analysis, Proof Theory, Set Theory,
Philosophy of Mathematics, Constructive Mathematics, Theory of
Randomness and Computational Complexity Theory. In honor of Professor
Kazuyuki Tanaka's 60th birthday, this year's conference will include
sessions covering areas in which Professor Tanaka has worked.
This conference is held jointly with a workshop of Bilateral Joint
Research Project sponsored by the Japan Society for the Promotion of
Science and the National University of Singapore. See the previous
workshop on this project JSPS-NUS Joint Workshop in Mathematical Logic
and Foundations of Mathematics (March 6 - 8, 2015, Kanazawa, Japan).
This is the fifth conference of CTFM conference series. See also the
last year conference Computability Theory and Foundations of
Mathematics 2014 (February 17 - 20, 2014, Tokyo, Japan).
--------------------------------------------
Invited Speakers
Ali Enayat (University of Gothenburg)
Sy Friedman (Kurt Gödel Research Center)
Leszek Kołodziejczyk (University of Warsaw)
Alberto Marcone (The University of Udine)
Nik Weaver (Washington University)
Stephen Binns (King Fahd University of Petroleum and Minerals)
Keng Meng Ng (Nanyang Technological University)
Guohua Wu (Nanyang Technological University)
Liang Yu (Nanjing University)
Sakae Fuchino (Kobe University)
Joel Hamkins (City University of New York)
Dilip Raghavan (National University of Singapore)
Hiroshi Sakai (Kobe University)
Walter Dean (University of Warwick)
Hidenori Kurokawa (Kobe University)
Kengo Okamoto (Tokyo Metropolitan University)
Toshio Suzuki (Tokyo Metropolitan University)
Tin Lok Wong (Kurt Gödel Research Center)
Keisuke Yoshii (Okinawa National College of Technology)
--------------------------------------------
Programme Committee
Chi Tat Chong (National University of Singapore, co-chair)
Kojiro Higuchi (Chiba University)
Makoto Kikuchi (Kobe University)
Takako Nemoto (JAIST)
Stephen G. Simpson (Pennsylvania State University, co-chair)
Toshimichi Usuba (Kobe University)
Andreas Weiermann (Ghent University)
Takeshi Yamazaki (Tohoku Universigy)
Yang Yue (National University of Singapore)
Keita Yokoyama (JAIST / UC Berkeley)
--------------------------------------------
Organising Committee
Makoto Fujiwara (JAIST)
Ryo Kashima (Tokyo Institute of Technology, local chair)
Takayuki Kihara (UC Berkeley)
Takako Nemoto (JAIST)
Florian Pelupessy (Tohoku University)
Takeshi Yamazaki (Tohoku University, co-chair)
Keita Yokoyama (JAIST / UC Berkeley, co-chair)
--------------------------------------------
どうぞよろしくお願い致します。
横山啓太
--
Keita Yokoyama
y-keita(a)jaist.ac.jp
--
Keita Yokoyama
y-keita(a)jaist.ac.jp
皆様、
北陸先端大の横山です。
以下の要領で研究集会
Computability Theory and Foundations of Mathematics 2015
(2015年9月7日(月)~9月11日(金),東京工業大学大岡山キャンパス)
を開催いたします.
詳しい情報については、下記のホームページをご覧ください。
http://www.jaist.ac.jp/CTFM/CTFM2015/index.html
本研究集会では、田中一之先生の還暦を記念して、田中先生の研究にちなんだセッションも行う予定です。
現在、参加登録を受付中です。参加登録の締め切りは8月21日となります。
宜しくご参加をご検討ください。
============================================================
Computability Theory and Foundations of Mathematics
(Tokyo Institute of Technology, Tokyo, Japan, September 7-11, 2015)
http://www.jaist.ac.jp/CTFM/CTFM2015/index.html
============================================================
Computability Theory and Foundations of Mathematics (CTFM) aims to
develop computability theory and logical foundations of Mathematics.
The scope involves the topics Computability Theory, Reverse
Mathematics, Nonstandard Analysis, Proof Theory, Set Theory,
Philosophy of Mathematics, Constructive Mathematics, Theory of
Randomness and Computational Complexity Theory. In honor of Professor
Kazuyuki Tanaka's 60th birthday, this year's conference will include
sessions covering areas in which Professor Tanaka has worked.
This conference is held jointly with a workshop of Bilateral Joint
Research Project sponsored by the Japan Society for the Promotion of
Science and the National University of Singapore. See the previous
workshop on this project JSPS-NUS Joint Workshop in Mathematical Logic
and Foundations of Mathematics (March 6 - 8, 2015, Kanazawa, Japan).
This is the fifth conference of CTFM conference series. See also the
last year conference Computability Theory and Foundations of
Mathematics 2014 (February 17 - 20, 2014, Tokyo, Japan).
--------------------------------------------
Invited Speakers
Ali Enayat (University of Gothenburg)
Sy Friedman (Kurt Gödel Research Center)
Leszek Kołodziejczyk (University of Warsaw)
Alberto Marcone (The University of Udine)
Nik Weaver (Washington University)
Stephen Binns (King Fahd University of Petroleum and Minerals)
Keng Meng Ng (Nanyang Technological University)
Guohua Wu (Nanyang Technological University)
Liang Yu (Nanjing University)
Sakae Fuchino (Kobe University)
Joel Hamkins (City University of New York)
Dilip Raghavan (National University of Singapore)
Hiroshi Sakai (Kobe University)
Walter Dean (University of Warwick)
Hidenori Kurokawa (Kobe University)
Kengo Okamoto (Tokyo Metropolitan University)
Toshio Suzuki (Tokyo Metropolitan University)
Tin Lok Wong (Kurt Gödel Research Center)
Keisuke Yoshii (Okinawa National College of Technology)
--------------------------------------------
Programme Committee
Chi Tat Chong (National University of Singapore, co-chair)
Kojiro Higuchi (Chiba University)
Makoto Kikuchi (Kobe University)
Takako Nemoto (JAIST)
Stephen G. Simpson (Pennsylvania State University, co-chair)
Toshimichi Usuba (Kobe University)
Andreas Weiermann (Ghent University)
Takeshi Yamazaki (Tohoku Universigy)
Yang Yue (National University of Singapore)
Keita Yokoyama (JAIST / UC Berkeley)
--------------------------------------------
Organising Committee
Makoto Fujiwara (JAIST)
Ryo Kashima (Tokyo Institute of Technology, local chair)
Takayuki Kihara (UC Berkeley)
Takako Nemoto (JAIST)
Florian Pelupessy (Tohoku University)
Takeshi Yamazaki (Tohoku University, co-chair)
Keita Yokoyama (JAIST / UC Berkeley, co-chair)
--------------------------------------------
どうぞよろしくお願い致します。
横山啓太
--
Keita Yokoyama
y-keita(a)jaist.ac.jp