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Apr
8
revised show that $\sum P(x,y) e^{x^2 + y^2}$ is a modular form over $\Gamma_0(4)$ where $P(x,y) = x^4 - 6 x^2 y^2 + y^4$
added 11 characters in body
Apr
8
revised show that $\sum P(x,y) e^{x^2 + y^2}$ is a modular form over $\Gamma_0(4)$ where $P(x,y) = x^4 - 6 x^2 y^2 + y^4$
deleted 31 characters in body
Apr
7
revised Let $\theta(z) = \sum q^{n^2}$, is $\theta(-1/z)$ also a theta function?
added 3 characters in body
Apr
6
revised Kloosterman Sums and Lattice Hyperbolas
added 2 characters in body
Mar
20
revised sum of divisors function $\sum \tau(n) = \frac{1}{4}$
added 755 characters in body
Mar
18
revised How to visualize the region $\mathbb{H}/\Gamma_0(4)$ and its cusps?
added 5 characters in body
Mar
11
revised Bijective proof of $ \sigma_0(m) \,\sigma_0(n) = \sum_{r | (m,n)} \sigma_0( mn / r^2) $?
edited title
Mar
11
revised Bijective proof of $ \sigma_0(m) \,\sigma_0(n) = \sum_{r | (m,n)} \sigma_0( mn / r^2) $?
added 2 characters in body
Mar
9
revised Simplify Product of sines
added 510 characters in body
Mar
4
revised Why is $1 - \frac{1}{1 - \frac{1}{1 - \ldots}}$ not real?
added 188 characters in body
Mar
2
revised Show that $ \sum_{\mathbb{Z}/N\mathbb{Z}} f(n) g(n+r)h(n+2r) = \sum_{a \in \mathbb{Z}/N\mathbb{Z}} \hat{f}(a)\hat{g}(-2a)\hat{h}(a)$
partial progress
Jan
25
revised express as contour integral $ f(x) = \int_0^\infty dt \; e^{-t/g} \; \frac{1}{\sqrt{1 - 2 t x}} $
edited body
Jan
15
revised Non-equivalent metrics on $PSL_2(\mathbb{R})$
added 774 characters in body
Jan
15
revised density of squarefree numbers in $\mathbb{Z}$ that are 1 mod 4
Stronger title
Jan
13
revised What is $\frac{1}{1+\sqrt[3]{2}}$ in $\mathbb{Q}(\sqrt[3]{2})$?
obviously the power is b^3 as the author meant to write
Jan
3
revised Graph Relatives for Tessellation of the Hyperbolic Plane
'moduLar' not 'modular'
Dec
27
revised Proof of Conway's “Simplicity Rule” for Surreal Numbers
added 37 characters in body
Dec
26
revised How do I simplify: $ \exp \left(-a \frac{\log x}{\log Q} \right) $?
added 199 characters in body
Dec
24
revised What is the series expansion of reciprocal of theta function $\frac{1}{\theta(z;q)}$?
edited title
Dec
24
revised What is the series expansion of reciprocal of theta function $\frac{1}{\theta(z;q)}$?
edited tags