User Georg Lehner

29 votes

2 answers

4k views

The philosophy behind local rings

asked Nov 24, 2016 at 16:21

25 votes

1 answer

2k views

A geometric theory of Blueprints? (Algebras over the field with one element)

asked Dec 12, 2015 at 22:04

24 votes

1 answer

1k views

Examples of $(\infty,1)$-topoi that are not given as sheaves on a Grothendieck topology

asked Jun 26, 2017 at 21:14

18 votes

3 answers

2k views

Alternate proofs of Hilberts Basis Theorem

asked Nov 7, 2015 at 11:56

18 votes

0 answers

323 views

The analogy between dualizable categories and compact Hausdorff spaces

asked Jul 8 at 14:09

14 votes

3 answers

2k views

Is there a universal property characterizing the category of compact Hausdorff spaces?

asked Jan 26, 2023 at 12:17

13 votes

1 answer

957 views

Relating two different approaches to the Atiyah-Hirzebruch Spectral Sequence

asked Mar 2, 2018 at 21:04

11 votes

1 answer

2k views

The set of subgroups of $F_2$

asked Jul 13, 2016 at 16:30

10 votes

1 answer

401 views

Definition of $Fun^G( \mathcal C, \mathcal D)$ in the setting of quasicategories

asked Feb 7, 2019 at 11:11

9 votes

0 answers

365 views

"Generalized theory of polynomials" for a given commutative Lawvere Theory

asked Jul 22, 2015 at 13:03

8 votes

1 answer

243 views

Finite group such that $K_{-1} (\mathbb Z G)$ has non-trivial torsion

asked Dec 2, 2020 at 16:12

8 votes

0 answers

124 views

The homotopy inverse on Quillen's $S^{-1}S$ construction

asked Jan 30 at 9:24

7 votes

1 answer

197 views

When is the category of sheaves on a site compactly assembled/a continuous category?

asked Oct 14 at 20:25

6 votes

1 answer

315 views

Commuting homotopy colimits and arbitrary products in spaces

asked Aug 22, 2023 at 13:31

5 votes

0 answers

158 views

Resources on a smooth topos containing complex analytic/holomorphic geometry

asked Jan 21, 2016 at 21:28

5 votes

0 answers

215 views

Realizing the 0-th Postnikov truncation of a spectrum in the category of orthogonal/symmetric spectra

asked Mar 29, 2018 at 15:03

4 votes

1 answer

512 views

The "$\infty$"-column in the periodic table of n-categories

asked Aug 26, 2015 at 13:37

4 votes

0 answers

94 views

How to describe a concrete generator of $\widetilde{K_0(\mathbb{Z}[C_{23}])} \cong \widetilde{K_0(\mathbb{Z}[\zeta_{23}])}$

asked Aug 7, 2023 at 8:36

4 votes

1 answer

173 views

Injectivity of assembly in A-theory for $BC_2 = \mathbb R P^\infty$ in degree $4$

asked Jan 8, 2022 at 7:50

Stack Exchange Network

19 Questions

The philosophy behind local rings

A geometric theory of Blueprints? (Algebras over the field with one element)

Examples of $(\infty,1)$-topoi that are not given as sheaves on a Grothendieck topology

Alternate proofs of Hilberts Basis Theorem

The analogy between dualizable categories and compact Hausdorff spaces

Is there a universal property characterizing the category of compact Hausdorff spaces?

Relating two different approaches to the Atiyah-Hirzebruch Spectral Sequence

The set of subgroups of $F_2$

Definition of $Fun^G( \mathcal C, \mathcal D)$ in the setting of quasicategories

"Generalized theory of polynomials" for a given commutative Lawvere Theory

Finite group such that $K_{-1} (\mathbb Z G)$ has non-trivial torsion

The homotopy inverse on Quillen's $S^{-1}S$ construction

When is the category of sheaves on a site compactly assembled/a continuous category?

Commuting homotopy colimits and arbitrary products in spaces

Resources on a smooth topos containing complex analytic/holomorphic geometry

Realizing the 0-th Postnikov truncation of a spectrum in the category of orthogonal/symmetric spectra

The "$\infty$"-column in the periodic table of n-categories

How to describe a concrete generator of $\widetilde{K_0(\mathbb{Z}[C_{23}])} \cong \widetilde{K_0(\mathbb{Z}[\zeta_{23}])}$

Injectivity of assembly in A-theory for $BC_2 = \mathbb R P^\infty$ in degree $4$