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- Polymath10, Post 2: Homological Approach
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- The Kadison-Singer Conjecture has beed Proved by Adam Marcus, Dan Spielman, and Nikhil Srivastava
- Polymath10, Post 2: Homological Approach
- Polymath10: The Erdos Rado Delta System Conjecture
- Why is Mathematics Possible: Tim Gowers's Take on the Matter
- New Ramanujan Graphs!
- Believing that the Earth is Round When it Matters
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- Answer: Lord Kelvin, The Age of the Earth, and the Age of the Sun
- From Oberwolfach: The Topological Tverberg Conjecture is False

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# Category Archives: Updates

## Many Short Updates

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
4 Comments

## NatiFest is Coming

The conference Poster as designed by Rotem Linial A conference celebrating Nati Linial’s 60th birthday will take place in Jerusalem December 16-18. Here is the conference’s web-page. To celebrate the event, I will reblog my very early 2008 post “Nati’s … Continue reading

Posted in Combinatorics, Computer Science and Optimization, Conferences, Updates
Tagged Nati Linial
2 Comments

## More around Borsuk

Piotr Achinger told me two things abour Karol Borsuk: From Wikipedea: Dunce hat Folding. The blue hole is only for better view Borsuk trumpet is another name for the contractible non-collapsible space commonly called also the “dunce hat“. (See … Continue reading

## Simons@UCBerkeley

Raghu Meka talking at the workshop I spend the semester in Berkeley at the newly founded Simons Institute for the Theory of Computing. The first two programs demonstrate well the scope of the center and why it is needed. One program … Continue reading

Posted in Conferences, Updates
1 Comment

## The Kadison-Singer Conjecture has beed Proved by Adam Marcus, Dan Spielman, and Nikhil Srivastava

…while we keep discussing why mathematics is possible… The news Adam Marcus, Dan Spielman, and Nikhil Srivastava posted a paper entitled “Interlacing Families II: Mixed Characteristic Polynomials and the Kadison-Singer Problem,” where they prove the 1959 Kadison-Singer conjecture. (We discussed part … Continue reading

## Polymath8: Bounded Gaps Between Primes

Yitang Zhang’s very recent shocking paper demonstrated that bounded gaps between primes occur infinitely often, with the explicit upper bound of 70,000,000 given for this gap. Polymath8 was launched for the dual purpose of learning Zhang’s proof and improving the upper bound … Continue reading

Posted in Mathematics over the Internet, Number theory, Updates
Tagged Polymath8, Twin primes conjecture
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## Why is mathematics possible?

Spectacular advances in number theory Last weeks we heard about two spectacular results in number theory. As announced in Nature, Yitang Zhang proved that there are infinitely many pairs of consecutive primes which are at most 70 million apart! This is a sensational achievement. … Continue reading

## Dan Mostow on Haaretz and Other Updates

Enlightenment at a red traffic light Wolf Prize laureate Prof. George Daniel Mostow made his greatest scientific breakthrough while driving. Haaretz tells the story of how Dan Mostow reached his breakthrough known as Mostow’s rigidity theorem. Congratulations, Dan! French-Isreali Meeting … Continue reading

## Indian Crested Porcupine

For a few days we had an Indian Crested Porcupine (דורבן) in our garden. It ate all the flowers and dug an impressive array of tunnels.

## Meeting with Aram Harrow, and my Lecture on Why Quantum Computers Cannot Work.

Last Friday, I gave a lecture at the quantum information seminar at MIT entitled “Why quantum computers cannot work and how.” It was a nice event with lovely participation during the talk, and a continued discussion after it. Many very … Continue reading