Monthly Archives: June 2010

הסטודנטיות כצנזור

Posted on June 24, 2010 by Gil Kalai

עדכון (4 ליולי 2010): בית הדין הארצי לעבודה ביטל את פסק הדין של בית המשפא האזורי ונתן מעמד של פסק דין לפשרה שהושגה בין ד”ר חנה קהת לבין מכללת אורות ואשר מסדירה את תנאי העסקתה  משנת הלימודים הבאה. ראה למטה … Continue reading →

Posted in Academics, Law, Women in science | Tagged | 2 Comments

The Polynomial Hirsch Conjecture: The Crux of the Matter.

Posted on June 19, 2010 by Gil Kalai

 Consider t disjoint families of subsets of {1,2,…,n}, .   Suppose that (*) For every , and every and , there is  which contains .  The basic question is: How large can t  be???   Let’s call the answer f(n).   … Continue reading →

Posted in Combinatorics, Convex polytopes, Open problems, Polymath3 | 5 Comments

“A Counterexample to the Hirsch Conjecture,” is Now Out

Posted on June 15, 2010 by Gil Kalai

  Francisco (Paco) Santos’s paper “A Counterexample to the Hirsch Conjecture” is now out:  For some further information and links to the media see also this page. Here is a link to a TV interview. Abstract: The Hirsch Conjecture (1957) … Continue reading →

Posted in Convex polytopes | Tagged , | 2 Comments

False Beliefs in Mathematics

Posted on June 6, 2010 by Gil Kalai

Test your intuition: For two n by n matrices A and B, is it always the case that tr(ABAB) = tr(ABBA)?

Posted in Mathematics over the Internet, Test your intuition | Tagged , , | 6 Comments