User Lennart Meier

91 votes

70 answers

18k views

Old books still used

asked Dec 28, 2012 at 16:24

89 votes

27 answers

12k views

Modern Mathematical Achievements Accessible to Undergraduates

asked May 5, 2013 at 19:02

34 votes

2 answers

6k views

Derived Algebraic Geometry and Chow Rings/Chow Motives

asked Jul 3, 2010 at 11:05

27 votes

3 answers

1k views

Graded analogues of theorems in commutative algebra

asked Jan 7, 2019 at 8:31

26 votes

1 answer

2k views

Infinity-categorical analogue of compact Hausdorff

asked Dec 17, 2020 at 20:50

22 votes

3 answers

820 views

Boardman's thesis or mimeographed notes

asked Dec 9, 2019 at 15:59

21 votes

2 answers

1k views

Cohomologically trivial stacks

asked Nov 19, 2012 at 16:16

17 votes

0 answers

1k views

Vector Bundles on the Moduli Stack of Elliptic Curves

asked Apr 9, 2010 at 10:06

17 votes

1 answer

3k views

Explicit integral representation theory

asked Jul 17, 2010 at 20:24

16 votes

1 answer

2k views

Group Completions and Infinite-Loop Spaces

asked Aug 25, 2010 at 13:48

16 votes

2 answers

752 views

String Orientation and Level Structures

asked Dec 9, 2014 at 19:32

14 votes

2 answers

6k views

When does sheaf cohomology commute with arbitrary direct sums?

asked Feb 4, 2013 at 22:22

13 votes

1 answer

445 views

Finite generation of module of modular forms

asked Oct 23, 2017 at 9:07

13 votes

1 answer

670 views

When is $A\otimes R$ a free $R$-module?

asked Nov 21, 2017 at 16:01

13 votes

1 answer

2k views

Homotopy limits of quasi-categories

asked Apr 24, 2012 at 13:22

13 votes

1 answer

1k views

Concrete Examples of Shimura Surfaces

asked Dec 3, 2014 at 20:49

12 votes

0 answers

464 views

Are automorphisms of abelian varieties detected by the formal group?

asked Jan 3, 2014 at 16:27

12 votes

2 answers

941 views

An analogue of the Bass-Quillen conjecture with power or Laurent series

asked Jul 22, 2013 at 12:58

10 votes

2 answers

2k views

Reference for Weighted Projective Stacks

asked Jul 16, 2013 at 16:20

10 votes

1 answer

2k views

Modular interpretation of nebentypus

asked Mar 21, 2013 at 15:49

10 votes

0 answers

227 views

Spaces with free MU-homology

asked Jan 13, 2012 at 10:57

9 votes

1 answer

2k views

Automorphisms of Generic Abelian Varieties

asked Apr 23, 2013 at 21:00

9 votes

0 answers

265 views

Unicity of Johnson-Wilson Theories

asked Feb 7, 2015 at 20:19

8 votes

1 answer

1k views

Vector bundles on open (affine) curves

asked Oct 9, 2015 at 13:05

8 votes

2 answers

986 views

Lifting the Hasse invariant mod $2$

asked Jan 15, 2016 at 15:28

8 votes

2 answers

527 views

Non-vanishing $\mathrm{lim}^1$-term for the cohomology of a CW-complex

asked Feb 10, 2014 at 0:45

8 votes

2 answers

408 views

Localizing Model Structures

asked Nov 23, 2009 at 17:37

7 votes

3 answers

2k views

Are the global sections of a vector bundle a projective module?

asked Nov 20, 2012 at 12:45

7 votes

0 answers

171 views

Are rings of modular forms normal?

asked Aug 31, 2016 at 19:47

7 votes

0 answers

224 views

Riemann-Roch for curves over Dedekind domains and base-change for modular forms

asked Dec 22, 2015 at 14:16

Stack Exchange Network

43 Questions

Old books still used

Modern Mathematical Achievements Accessible to Undergraduates

Derived Algebraic Geometry and Chow Rings/Chow Motives

Graded analogues of theorems in commutative algebra

Infinity-categorical analogue of compact Hausdorff

Boardman's thesis or mimeographed notes

Cohomologically trivial stacks

Vector Bundles on the Moduli Stack of Elliptic Curves

Explicit integral representation theory

Group Completions and Infinite-Loop Spaces

String Orientation and Level Structures

When does sheaf cohomology commute with arbitrary direct sums?

Finite generation of module of modular forms

When is $A\otimes R$ a free $R$-module?

Homotopy limits of quasi-categories

Concrete Examples of Shimura Surfaces

Are automorphisms of abelian varieties detected by the formal group?

An analogue of the Bass-Quillen conjecture with power or Laurent series

Reference for Weighted Projective Stacks

Modular interpretation of nebentypus

Spaces with free MU-homology

Automorphisms of Generic Abelian Varieties

Unicity of Johnson-Wilson Theories

Vector bundles on open (affine) curves

Lifting the Hasse invariant mod $2$

Non-vanishing $\mathrm{lim}^1$-term for the cohomology of a CW-complex

Localizing Model Structures

Are the global sections of a vector bundle a projective module?

Are rings of modular forms normal?

Riemann-Roch for curves over Dedekind domains and base-change for modular forms