Stack Exchange

Boaz Tsaban

Israel

http://www.cs.biu.ac.il/~tsaban

Mainly interested in:

  1. Set theory and topology, with emphasis on selection principles.

  2. Mathematical cryptology and computational group theory.

  3. Ramsey theory.

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Top Questions
32 votes

Bidi: A new cardinal characteristic of the continuum?

set-theory gn.general-topology independence-results selection-principles cardinal-characteristics asked May 12, 2015 at 2:27
mathoverflow.net

19 votes

The cofinality of $(\mathbb{N}^\kappa,\le)$ for uncountable $\kappa$?

set-theory gn.general-topology topological-groups foundations asked Oct 18, 2015 at 17:35
mathoverflow.net

16 votes

$\mathfrak{ufo}$: An unidentified combinatorial cardinal characteristic of the continuum?

lo.logic set-theory gn.general-topology selection-principles asked Apr 5, 2016 at 16:19
mathoverflow.net

15 votes

Covering the space by disjoint unit circles

reference-request set-theory gt.geometric-topology asked Apr 3, 2014 at 11:52
mathoverflow.net

13 votes

The Simultaneous Conjugacy Problem in the symmetric group $S_N$

co.combinatorics symmetric-group computational-group-theo conjugacy-classes asked Apr 4, 2014 at 11:33
mathoverflow.net

13 votes

Avoiding countable subgroups of a group homeomorphic to the Cantor space

set-theory gn.general-topology profinite-groups combinatorial-group-theor asked Jun 17, 2015 at 15:06
mathoverflow.net

12 votes

A classic cardinal characteristic of the continuum in disguise?

set-theory descriptive-set-theory asked Mar 26, 2015 at 23:04
mathoverflow.net

9 votes

How many closed measure zero sets are needed to cover the real line?

set-theory forcing foundations asked Dec 14, 2015 at 2:53
mathoverflow.net

8 votes

Avoiding countable subgroups of general uncountable groups

gr.group-theory topological-groups descriptive-set-theory profinite-groups combinatorial-group-theor asked Jun 12, 2015 at 0:11
mathoverflow.net

8 votes

What is $0^0$, in ordinal exponentiation?

set-theory ordinals asked Dec 13, 2016 at 14:17
math.stackexchange.com

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Top Answers