Monthly Archives: January 2014

Joel David Hamkins’ 1000th MO Answer is Coming

Posted on January 29, 2014 by Gil Kalai

Updates (May 2014): The second MO contributor to answer 1000 questions is another distinguished mathematician (and a friend) Igor Rivin.  In summer 2015 David Speyer joined the club. (May 2018) Igor is the first MO user to have 2000 posts (Questions+Answers)! … Continue reading →

Posted in Mathematical logic and set theory, Mathematics over the Internet | Tagged , | 3 Comments

Amazing: Peter Keevash Constructed General Steiner Systems and Designs

Posted on January 16, 2014 by Gil Kalai

Here is one of the central and oldest problems in combinatorics: Problem: Can you find a collection S of q-subsets from an n-element set X set so that every r-subset of X is included in precisely λ sets in the collection? … Continue reading →

Posted in Combinatorics, Open problems | Tagged , , , | 17 Comments

Many Short Updates

Posted on January 16, 2014 by Gil Kalai

Things in Berkeley and later here in Jerusalem were very hectic so I did not blog much since mid October. Much have happened so let me give brief and scattered highlights review. Two “real analysis” workshops at the Simons Institute … Continue reading →

Posted in Conferences, Updates | 5 Comments