Question

Quotient of modular group and principal congruence subgroup

score 44 · Answer 1 · 2026-03-25 09:27:22

44

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Quotient of modular group and principal congruence subgroup

Published on 25 Mar 2026 - 9:27

score 81 · Answer 2 · 2026-03-25 16:02:15

81

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Reference request: Universal central extension of $\operatorname{PSl}_2(\mathbb Z)$ is the braid group $\mathcal B_3$.

Published on 25 Mar 2026 - 16:02

score 41 · Answer 3 · 2026-03-25 09:26:27

41

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Riemann Surfaces Associated to Subgroups of the Modular Group

Published on 25 Mar 2026 - 9:26

score 44 · Answer 4 · 2026-03-25 07:46:10

44

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Equivalence between parabolic 1-cocyles and right representations of modular group (from a paper of Zaiger)

Published on 25 Mar 2026 - 7:46

score 76 · Answer 5 · 2026-04-22 20:33:40

76

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what is the exact relation between Dedekind tessellation and modular group

Published on 22 Apr 2026 - 20:33

score 201 · Answer 6 · 2026-03-25 12:15:29

201

Views

Is $\text{SL}(2, \mathbf Z)\simeq\text{Aut}(\mathbf P^1(\mathbf Z))$?

Published on 25 Mar 2026 - 12:15

score 102 · Answer 7 · 2026-03-25 07:43:23

102

Views

Isomorphism of lattices/complex tori

Published on 25 Mar 2026 - 7:43

score 32 · Answer 8 · 2026-03-25 07:43:23

32

Views

Modular symbols, Manin symbols, two and three term relation

Published on 25 Mar 2026 - 7:43

score 33 · Answer 9 · 2026-04-05 23:00:26

33

Views

Almost holomorphic functions

Published on 05 Apr 2026 - 23:00

score 56 · Answer 10 · 2026-04-26 08:48:53

56

Views

Finite index subgroup of congruence subgroup $\Gamma_0(4)$ and $\Gamma$

Published on 26 Apr 2026 - 8:48

score 18 · Answer 11 · 2026-03-19 08:34:38

18

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Family of lattices defined by $\langle 1,\tau_n \rangle$ with vanishing imaginary part as $n\to\infty$

Published on 19 Mar 2026 - 8:34

score 81 · Answer 12 · 2026-03-25 07:47:59

81

Views

Orbit of $z$ under $SL_2({\mathbb Z})$ action

Published on 25 Mar 2026 - 7:47

score 235 · Answer 13 · 2026-03-25 07:42:45

235

Views

Action of full modular group on higher level modular functions

Published on 25 Mar 2026 - 7:42

score 607 · Answer 14 · 2026-04-30 08:35:35

607

Views

Name of the modular group

Published on 30 Apr 2026 - 8:35

score 155 · Answer 15 · 2026-04-30 13:04:25

155

Views

generalisations of the modular group

Published on 30 Apr 2026 - 13:04

List Question

Quotient of modular group and principal congruence subgroup

Reference request: Universal central extension of $\operatorname{PSl}_2(\mathbb Z)$ is the braid group $\mathcal B_3$.

Riemann Surfaces Associated to Subgroups of the Modular Group

Equivalence between parabolic 1-cocyles and right representations of modular group (from a paper of Zaiger)

what is the exact relation between Dedekind tessellation and modular group

Is $\text{SL}(2, \mathbf Z)\simeq\text{Aut}(\mathbf P^1(\mathbf Z))$?

Isomorphism of lattices/complex tori

Modular symbols, Manin symbols, two and three term relation

Almost holomorphic functions

Finite index subgroup of congruence subgroup $\Gamma_0(4)$ and $\Gamma$

Family of lattices defined by $\langle 1,\tau_n \rangle$ with vanishing imaginary part as $n\to\infty$

Orbit of $z$ under $SL_2({\mathbb Z})$ action

Action of full modular group on higher level modular functions

Name of the modular group

generalisations of the modular group

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