User Michał Kukieła - MathOverflow

Michał Kukieła

Member for 14 years, 4 months
Last seen more than 2 years ago

www-users.mat.umk.pl/~mckuk/…
Toruń (Poland)

29 Answers

Score Activity Newest

20 votes

What are your favorite instructional counterexamples?

answered Mar 2, 2010 at 20:17

14 votes

Interesting examples of vacuous / void entities

answered Feb 11, 2014 at 11:09

12 votes

Is the fixed point property for posets preserved by products?

answered Sep 2, 2014 at 12:57

10 votes

The half-life of a theorem, or Arnold's principle at work

answered May 3, 2014 at 16:31

10 votes

Continuous bijections vs. Homeomorphisms

answered Jun 14, 2013 at 11:08

9 votes

Great mathematicians born 1850-1920 (ET Bell's book ≲ x ≲ Fields Medalists)

answered Apr 6, 2013 at 11:10

7 votes

In model theory, does compactness easily imply completeness?

answered Jan 25, 2010 at 8:52

7 votes

Why the search for ever larger primes?

answered Jan 30, 2010 at 18:34

6 votes

Non-homeomorphic spaces that have continuous bijections between them

answered Jun 14, 2013 at 10:49

6 votes

fixed simplicial complex under group action

answered Nov 6, 2018 at 22:19

5 votes

Cops and drunken robbers

answered Nov 27, 2014 at 16:01

5 votes

Example of collapsible complex which collapses to a non-collapsible complex

answered Feb 10, 2013 at 22:10

4 votes

Are there two non-homotopy equivalent spaces with equal homotopy groups?

answered May 27, 2010 at 13:19

4 votes

Banach and Knaster-Tarski fixed point theorems -- are they related?

answered May 15, 2012 at 12:11

4 votes

Fixed point theorems

answered Apr 19, 2014 at 16:57

4 votes

Accepted

Fixed-point-free group action on a finite, contractible, 3-dimensional simplicial complex

answered Aug 7, 2017 at 16:52

3 votes

Examples of graph properties characterized by forbidden (not necessarily induced) subgraphs

answered May 22, 2014 at 12:35

2 votes

Video lectures of mathematics courses available online for free

answered Jun 3, 2014 at 14:12

2 votes

Elementary+Short+Useful

answered Mar 27, 2014 at 9:25

2 votes

Computing homology of very large posets

answered Oct 23, 2013 at 15:16

2 votes

Algorithm to find an acyclic matching on a poset

answered Nov 27, 2013 at 20:24

2 votes

Non-homeomorphic spaces such that taking away a point makes them homeomorphic

answered May 6, 2017 at 19:05

1 vote

Accepted

Maximal number of antichains of a connected poset

answered Apr 25, 2014 at 10:20

1 vote

Topological properties for which bijectively related imply homeomorphism

answered May 6, 2016 at 20:05

1 vote

Knaster Tarski theorem, example needed

answered Apr 19, 2014 at 16:30

1 vote

A book in topology

answered Nov 22, 2013 at 15:58

1 vote

CW complex with generalized cells

answered Jun 3, 2014 at 20:27

0 votes

Fixed point for a self-mapping on subset of C[0,1]

answered Nov 4, 2013 at 10:52

0 votes

Which great mathematicians had great political commitments?

answered Feb 23, 2021 at 11:21