Question

Principal congruence subgroup $\Gamma(DN)$ and $\Gamma(N)$

score 170 · Answer 1 · 2020-03-01 16:38:54

170

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Principal congruence subgroup $\Gamma(DN)$ and $\Gamma(N)$

Published on 01 Mar 2020 - 16:38

score 82 · Answer 2 · 2026-03-25 05:59:53

82

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Meromorphic functions on upper half plane and infinity

Published on 25 Mar 2026 - 5:59

score 127 · Answer 3 · 2020-03-05 22:23:26

127

Views

Let $\frac{r}{2t}\in\mathbb{Q}$ with $r,t$ odd, then $\frac{r}{2t}\in\Gamma_1(4)*\frac{1}{2}$ with $\Gamma_1(4)$ a principal subgroup.

Published on 05 Mar 2020 - 22:23

score 51 · Answer 4 · 2026-03-25 06:05:11

51

Views

Allowed ramification of deformations of Galois representations

Published on 25 Mar 2026 - 6:05

score 85 · Answer 5 · 2020-03-13 05:00:44

85

Views

Definition of congruence subgroup $\Gamma_0(N)$ when $N$ is negative

Published on 13 Mar 2020 - 5:00

score 830 · Answer 6 · 2020-03-16 01:23:04

830

Views

Why are the Fourier coefficients of a modular form constant?

Published on 16 Mar 2020 - 1:23

score 539 · Answer 7 · 2020-03-18 10:55:42

539

Views

Computing the width of a cusp of a congruence subgroup of level $N$ "in characteristic $N$".

Published on 18 Mar 2020 - 10:55

score 162 · Answer 8 · 2026-03-22 03:50:59

162

Views

Do all cuspidal automorphic representations of $\operatorname{GL}_2(\mathbb A_{\mathbb Q})$ come from Maass or holomorphic cusp forms?

Published on 22 Mar 2026 - 3:50

score 599 · Answer 9 · 2020-03-21 16:02:34

599

Views

$SL(2, \Bbb Z)$ has only one cusp

Published on 21 Mar 2020 - 16:02

score 183 · Answer 10 · 2026-03-25 06:06:35

183

Views

Proof of Meromorphicity of Eisenstein Series in Serre's 'A Course in Arithmetic'

Published on 25 Mar 2026 - 6:06

score 23 · Answer 11 · 2020-03-26 21:29:32

23

Views

Identifying Modular Functions of Weight $2k$ with Lattice Functions of Weight $2k$

Published on 26 Mar 2020 - 21:29

score 122 · Answer 12 · 2020-03-27 10:40:59

122

Views

Order of a Modular Function at a Point is Invariant under $SL_2(\mathbb{Z})$ Action: Interpretation and Proof

Published on 27 Mar 2020 - 10:40

score 742 · Answer 13 · 2026-03-09 05:55:16

742

Views

Fundamental domain for congruence subgroup.

Published on 09 Mar 2026 - 5:55

score 96 · Answer 14 · 2020-03-28 15:20:15

96

Views

Various variants of modular forms

Published on 28 Mar 2020 - 15:20

score 196 · Answer 15 · 2026-03-22 16:39:42

196

Views

Modularity in terms of the stack of elliptic curves

Published on 22 Mar 2026 - 16:39

List Question

Principal congruence subgroup $\Gamma(DN)$ and $\Gamma(N)$

Meromorphic functions on upper half plane and infinity

Let $\frac{r}{2t}\in\mathbb{Q}$ with $r,t$ odd, then $\frac{r}{2t}\in\Gamma_1(4)*\frac{1}{2}$ with $\Gamma_1(4)$ a principal subgroup.

Allowed ramification of deformations of Galois representations

Definition of congruence subgroup $\Gamma_0(N)$ when $N$ is negative

Why are the Fourier coefficients of a modular form constant?

Computing the width of a cusp of a congruence subgroup of level $N$ "in characteristic $N$".

Do all cuspidal automorphic representations of $\operatorname{GL}_2(\mathbb A_{\mathbb Q})$ come from Maass or holomorphic cusp forms?

$SL(2, \Bbb Z)$ has only one cusp

Proof of Meromorphicity of Eisenstein Series in Serre's 'A Course in Arithmetic'

Identifying Modular Functions of Weight $2k$ with Lattice Functions of Weight $2k$

Order of a Modular Function at a Point is Invariant under $SL_2(\mathbb{Z})$ Action: Interpretation and Proof

Fundamental domain for congruence subgroup.

Various variants of modular forms

Modularity in terms of the stack of elliptic curves

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