User Lennart Meier - MathOverflow

Lennart Meier

Member for 14 years, 5 months
Last seen this week

staff.science.uu.nl/~meier007
Utrecht, Netherlands

94 Answers

Score Activity Newest

145 votes

Examples of common false beliefs in mathematics

answered May 4, 2010 at 21:29

72 votes

Most intricate and most beautiful structures in mathematics

answered Dec 13, 2010 at 23:03

53 votes

Accepted

Spheres with the same homotopy groups

answered Feb 20, 2022 at 16:10

50 votes

Accepted

Compact open topology

answered May 10, 2013 at 20:26

50 votes

What is modern algebraic topology(homotopy theory) about?

answered Jan 14, 2016 at 12:31

48 votes

Has philosophy ever clarified mathematics?

answered Oct 2, 2014 at 0:59

42 votes

Which math paper maximizes the ratio (importance)/(length)?

answered Dec 1, 2009 at 19:48

39 votes

‘Naturally occurring’ $K(\pi, n)$ spaces, for $n \geq 2$

answered Oct 29, 2010 at 12:45

38 votes

Why do we need model categories?

answered Nov 27, 2017 at 15:25

37 votes

Do we still need model categories?

answered Oct 21, 2011 at 12:37

36 votes

What are Jacob Lurie's key insights?

answered Sep 6, 2010 at 10:28

36 votes

Most important results in 2022

answered Dec 2, 2022 at 10:34

35 votes

What non-categorical applications are there of homotopical algebra?

answered Jun 7, 2014 at 8:21

28 votes

Latest results in chromatic homotopy theory

answered May 4, 2020 at 16:49

27 votes

"Why the heck are the homotopy groups of the sphere so damn complicated?"

answered Apr 27, 2010 at 8:39

23 votes

Accepted

References and resources for (learning) chromatic homotopy theory and related areas

answered Feb 27, 2019 at 10:48

21 votes

New proofs to major theorems leading to new insights and results?

answered Feb 11, 2011 at 15:26

20 votes

Who was Hermann Künneth?

answered May 5, 2015 at 15:56

20 votes

What problem in pure mathematics required solution techniques from the widest range of math sub-disciplines?

answered Jun 12, 2017 at 8:18

20 votes

Examples of algorithms requiring deep mathematics to prove correctness

answered Jul 13, 2016 at 6:51

19 votes

Mathematical "urban legends"

answered Feb 4, 2011 at 21:04

18 votes

Accepted

Vanishing of higher homotopy groups of finite complexes

answered Oct 29, 2010 at 11:56

18 votes

de Rham cohomology and flat vector bundles

answered Nov 23, 2009 at 21:55

18 votes

What are some deep theorems, and why are they considered deep?

answered Aug 20, 2013 at 11:47

18 votes

Accepted

Does an H-space have at most one delooping?

answered Jan 16, 2019 at 9:03

17 votes

Accepted

Stable homotopy groups of complex projective plane

answered Apr 29, 2021 at 11:11

16 votes

Every mathematician has only a few tricks

answered Jul 10, 2020 at 15:55

16 votes

Do we still need models of spectra other than the $\infty$-category $\mathrm{Sp}$?

answered Feb 13, 2019 at 8:37

16 votes

Rediscovery of lost mathematics

answered Jul 23, 2014 at 11:48

16 votes

Accepted

Closed 3-manifolds with free abelian fundamental groups

answered Jul 14, 2010 at 21:23

1