Last Build Date: Tue, 28 Mar 2017 11:27:59 +0000
Tue, 28 Mar 2017 11:27:59 +0000We are looking for two PhD students at the Faculty of Mathematics and Physics, University of Ljubljana. The programme starts in October 2017 and lasts three years. The positions will be fully funded (subject to approval by the funding agency). The candidates should have a Master’s degree in mathematics or computer science. No knowledge of … Continue reading Two PhD positions in Ljubljana starting October 2017
Mon, 10 Oct 2016 15:27:59 +0000In 2013 I gave a talk about constructive mathematics “Five stages of accepting constructive mathematics” (video) at the Institute for Advanced Study. I turned the talk into a paper, polished it up a bit, added things here and there, and finally it has now been published in the Bulletin of the American Mathematical Society. It is … Continue reading Five stages of accepting constructive mathematics
Wed, 07 Sep 2016 08:39:16 +0000It is my pleasure to announce the new and improved Programming languages Zoo, a potpourri of miniature but fully functioning programming language implementations. The new zoo has a decent web site, it is now hosted on GitHub, and the source code was cleaned up. Many thanks to Matija Pretnar for all the work. The purpose of … Continue reading The new and improved Programming languages zoo
Tue, 30 Aug 2016 15:08:36 +0000I have participated in a couple of lengthy discussions about formal proofs. I realized that an old misconception is creeping in. Let me expose it. In traditional mathematical logic (by which I mean first-order logic, as established by Hilbert, Ackermann, Skolem, Gödel and others) the concepts of logical formula and formal proof are the central notions. This … Continue reading Formal proofs are not just deduction steps
Tue, 09 Aug 2016 12:28:11 +0000Mike Shulman just wrote a very nice blog post on what is a formal proof. I much agree with what he says, but I would like to offer my own perspective. I started writing it as a comment to Mike’s post and then realized that it is too long, and that I would like to have … Continue reading What is a formal proof?