List questions from modular-forms

Published on 17 Oct 2013 - 8:05

837

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Calculating index of a subgroup

Published on 21 Oct 2013 - 15:14

627

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Topology of the completed upper-half plane

Published on 21 Oct 2013 - 21:01

3k

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Find the cusps for the congruence subgroup $\Gamma_0(p)$

Published on 30 Oct 2013 - 22:55

58

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Determining cosets of representatives

Published on 09 Nov 2013 - 0:25

122

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Automorphisms of elliptic curves with a point of order N

Published on 26 Mar 2026 - 4:53

861

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Why is the modular $\lambda$ function a quotient of two meromorphic functions in the U.H.P.?

Published on 27 Mar 2026 - 3:49

324

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Monstrous Moonshine for $M_{24}$?

Published on 26 Mar 2026 - 9:48

817

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Where does Klein's j-invariant take the values 0 and 1, and with what multiplicities?

Published on 27 Mar 2026 - 3:41

302

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Approximation of $e^{\pi\sqrt{n}}$ using Ramanujan's Class Invariants

Published on 08 Dec 2013 - 6:01

1k

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How to show that $\Delta\left(\frac{az+b}{cz+d}\right)=(cz+d)^{12}\Delta(z)$?

Published on 12 Dec 2013 - 15:47

6k

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Introductive Book on Modular Forms

Published on 14 Dec 2013 - 15:51

1.5k

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Other interesting consequences of $d=163$?

Published on 31 Mar 2026 - 17:48

770

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The natural boundary of the modular $\lambda$ function is the real axis

Published on 27 Mar 2026 - 5:37

91

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Size of automorphism group of element of $Y_0(5)$

Published on 27 Mar 2026 - 22:00

List Question

Principal congruence subgroups

Calculating index of a subgroup

Topology of the completed upper-half plane

Find the cusps for the congruence subgroup $\Gamma_0(p)$

Determining cosets of representatives

Automorphisms of elliptic curves with a point of order N

Why is the modular $\lambda$ function a quotient of two meromorphic functions in the U.H.P.?

Monstrous Moonshine for $M_{24}$?

Where does Klein's j-invariant take the values 0 and 1, and with what multiplicities?

Approximation of $e^{\pi\sqrt{n}}$ using Ramanujan's Class Invariants

How to show that $\Delta\left(\frac{az+b}{cz+d}\right)=(cz+d)^{12}\Delta(z)$?

Introductive Book on Modular Forms

Other interesting consequences of $d=163$?

The natural boundary of the modular $\lambda$ function is the real axis

Size of automorphism group of element of $Y_0(5)$

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