Question

Eisenstein sum.

score 225 · Answer 1 · 2026-03-28 23:40:33

225

Views

Eisenstein sum.

Published on 28 Mar 2026 - 23:40

score 121 · Answer 2 · 2023-06-05 03:55:04

121

Views

What is the history behind the discovery of the almost-integer values of $ e^{\pi \sqrt{d}} $?

Published on 05 Jun 2023 - 3:55

score 67 · Answer 3 · 2023-06-05 17:14:58

67

Views

How to see there are no nontrivial cusp forms for $\Gamma_0(4)$ of weight 2

Published on 05 Jun 2023 - 17:14

score 81 · Answer 4 · 2023-06-05 22:34:59

81

Views

Modular forms of $M_1(\Gamma_1(4), \chi)$

Published on 05 Jun 2023 - 22:34

score 64 · Answer 5 · 2026-03-27 14:02:26

64

Views

Fricke involution’s effect on character

Published on 27 Mar 2026 - 14:02

score 49 · Answer 6 · 2023-06-06 07:09:43

49

Views

Another proof for $S_2(\Gamma_0(4))=\{0\}$

Published on 06 Jun 2023 - 7:09

score 65 · Answer 7 · 2026-03-25 09:26:56

65

Views

Connection between lattice basis vector and algebraic coefficients of a complex elliptic curve

Published on 25 Mar 2026 - 9:26

score 32 · Answer 8 · 2023-06-11 15:14:01

32

Views

Can the cusps $0$ and $\infty$ coincide modulo $p$?

Published on 11 Jun 2023 - 15:14

score 24 · Answer 9 · 2023-06-14 19:17:44

24

Views

Quotient of Congruence Subgroups Modulo Powers of Prime as $p$-Groups

Published on 14 Jun 2023 - 19:17

score 40 · Answer 10 · 2023-06-14 19:33:09

40

Views

on-Isomorphism of Alternating Group $A_n$ as a Composition Factor in Composition Series of $\mathrm{SL}_2\left(\mathbb{Z} / p^t \mathbb{Z}\right)$

Published on 14 Jun 2023 - 19:33

score 356 · Answer 11 · 2026-03-26 12:32:22

356

Views

Sum involving the Euler's Pentagonal Number function derivative.

Published on 26 Mar 2026 - 12:32

score 58 · Answer 12 · 2023-06-18 11:22:42

58

Views

Valence formula for level 2 modular forms

Published on 18 Jun 2023 - 11:22

score 32 · Answer 13 · 2023-06-21 00:26:49

32

Views

Evaluating Fourier Coefficients and Proving Equivalence of Fourier Expansion for Eisenstein Series and Classical Einsenstein Series

Published on 21 Jun 2023 - 0:26

score 34 · Answer 14 · 2026-03-25 19:03:37

34

Views

Theta Functions in $\mathbb{C} \cdot \Delta$ and Spanning $M_{4k}(\mathrm{SL}{2}(\mathbb{Z}), \vartheta{\text {tr }})$

Published on 25 Mar 2026 - 19:03

score 57 · Answer 15 · 2023-06-21 00:58:23

57

Views

Proving Properties and Calculating the Commensurator of Subgroups in $\mathrm{GL}_{2}^{+}(\mathbb{R})$

Published on 21 Jun 2023 - 0:58

List Question

Eisenstein sum.

What is the history behind the discovery of the almost-integer values of $ e^{\pi \sqrt{d}} $?

How to see there are no nontrivial cusp forms for $\Gamma_0(4)$ of weight 2

Modular forms of $M_1(\Gamma_1(4), \chi)$

Fricke involution’s effect on character

Another proof for $S_2(\Gamma_0(4))=\{0\}$

Connection between lattice basis vector and algebraic coefficients of a complex elliptic curve

Can the cusps $0$ and $\infty$ coincide modulo $p$?

Quotient of Congruence Subgroups Modulo Powers of Prime as $p$-Groups

on-Isomorphism of Alternating Group $A_n$ as a Composition Factor in Composition Series of $\mathrm{SL}_2\left(\mathbb{Z} / p^t \mathbb{Z}\right)$

Sum involving the Euler's Pentagonal Number function derivative.

Valence formula for level 2 modular forms

Evaluating Fourier Coefficients and Proving Equivalence of Fourier Expansion for Eisenstein Series and Classical Einsenstein Series

Theta Functions in $\mathbb{C} \cdot \Delta$ and Spanning $M_{4k}(\mathrm{SL}{2}(\mathbb{Z}), \vartheta{\text {tr }})$

Proving Properties and Calculating the Commensurator of Subgroups in $\mathrm{GL}_{2}^{+}(\mathbb{R})$

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