User Lennart Meier

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What does the classifying space of a topological monoid classify?

answered Dec 14, 2018 at 7:07

7 votes

Examples of famous 'workhorse' theorems

answered Aug 29, 2016 at 19:41

7 votes

Pseudonyms of famous mathematicians

answered Apr 26, 2016 at 20:18

7 votes

Infinite families in stable homotopy groups

answered Jul 4, 2016 at 10:26

7 votes

Finiteness of stable homotopy groups of spheres

answered Oct 31, 2019 at 15:31

6 votes

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Purity of Brauer group for stacks

answered Oct 21, 2019 at 7:03

6 votes

Example s.t. the unbased loop-space is not $\Omega X \times X$

answered Apr 22, 2015 at 3:05

6 votes

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Learning roadmap for geometric topology

answered Apr 22, 2013 at 16:54

6 votes

Good introductory references on algebraic stacks?

answered Oct 28, 2011 at 15:41

6 votes

What is known about K-theory and K-homology groups of (free) loop spaces?

answered Apr 30, 2010 at 9:45

5 votes

A list of machineries for computing cohomology

answered Apr 1, 2010 at 10:46

5 votes

What do mathematicians currently do in conformal field theory (or more general field theory)

answered Aug 29, 2010 at 16:31

5 votes

What are some examples of "chimeras" in mathematics?

answered Jul 25, 2012 at 9:41

5 votes

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manifold with given rational homology

answered Jul 28, 2011 at 21:21

5 votes

When does the module of Katz modular forms contain a basis for the vector space of classical modular forms?

answered Oct 24, 2017 at 8:29

5 votes

Homotopy group action and equivariant cohomology theories

answered Jul 3, 2020 at 9:59

5 votes

Analogy between Stiefel-Whitney and Chern classes

answered May 11, 2020 at 8:59

5 votes

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Etale $K$ theory coincides with algebraic one in high enough degrees

answered Aug 24, 2021 at 7:58

5 votes

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Reference for universal elliptic curves

answered Jun 21, 2022 at 8:19

4 votes

When does base-change in topological spaces preserve quotient maps?

answered Apr 24, 2023 at 9:42

4 votes

Easier ways to compute homology/cohomology by adding extra structure

answered Oct 14, 2019 at 7:40

4 votes

Applications of Brouwer's fixed point theorem

answered Jan 24, 2011 at 22:26

4 votes

Occurrences of (co)homology in other disciplines and/or nature

answered Oct 25, 2012 at 6:34

4 votes

A Learning Roadmap request: From high-school to mid-undergraduate studies

answered Jun 16, 2010 at 11:50

4 votes

Derivators (in English)

answered Mar 8, 2010 at 18:51

4 votes

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Do trivial homotopy groups imply existence of boundary preserving homotopies?

answered Oct 23, 2017 at 15:53

4 votes

Is the moduli of formal groups smooth?

answered Oct 20, 2015 at 7:35

4 votes

A reference for $\mathbb{A}^1_R$ being a coarse moduli space of the stack of elliptic curves

answered Mar 4, 2015 at 20:20

3 votes

What books should I read before beginning Masaki Kashiwara and Pierre Schapira's "Sheaves on Manifolds"

answered Jul 3, 2010 at 12:37

3 votes

Algebraic geometry used "externally" (in problems without obvious algebraic structure).

answered Sep 2, 2010 at 11:13

Stack Exchange Network

94 Answers

What does the classifying space of a topological monoid classify?

Examples of famous 'workhorse' theorems

Pseudonyms of famous mathematicians

Infinite families in stable homotopy groups

Finiteness of stable homotopy groups of spheres

Purity of Brauer group for stacks

Example s.t. the unbased loop-space is not $\Omega X \times X$

Learning roadmap for geometric topology

Good introductory references on algebraic stacks?

What is known about K-theory and K-homology groups of (free) loop spaces?

A list of machineries for computing cohomology

What do mathematicians currently do in conformal field theory (or more general field theory)

What are some examples of "chimeras" in mathematics?

manifold with given rational homology

When does the module of Katz modular forms contain a basis for the vector space of classical modular forms?

Homotopy group action and equivariant cohomology theories

Analogy between Stiefel-Whitney and Chern classes

Etale $K$ theory coincides with algebraic one in high enough degrees

Reference for universal elliptic curves

When does base-change in topological spaces preserve quotient maps?

Easier ways to compute homology/cohomology by adding extra structure

Applications of Brouwer's fixed point theorem

Occurrences of (co)homology in other disciplines and/or nature

A Learning Roadmap request: From high-school to mid-undergraduate studies

Derivators (in English)

Do trivial homotopy groups imply existence of boundary preserving homotopies?

Is the moduli of formal groups smooth?

A reference for $\mathbb{A}^1_R$ being a coarse moduli space of the stack of elliptic curves

What books should I read before beginning Masaki Kashiwara and Pierre Schapira's "Sheaves on Manifolds"

Algebraic geometry used "externally" (in problems without obvious algebraic structure).