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Nov
11
answered Bernoulli Numbers and radius of convergence
Nov
11
comment Alternative complex analysis proof of Fundamental Theorem of Algebra
mathoverflow.net/questions/10535/…
Nov
11
answered Understanding branch cuts by manually choosing the branch cuts of a function
Nov
11
comment Find $n$ such that $(\mathbb{Z}/n\mathbb{Z})^\times \simeq \mathbb{Z}_2 \times \mathbb{Z}_2$.
The list is telling me that there are probably only finitely many $n$ such that $\phi(n) = m$, so maybe I should ask a different question about these abelian groups.
Nov
11
accepted Find $n$ such that $(\mathbb{Z}/n\mathbb{Z})^\times \simeq \mathbb{Z}_2 \times \mathbb{Z}_2$.
Nov
11
comment Find $n$ such that $(\mathbb{Z}/n\mathbb{Z})^\times \simeq \mathbb{Z}_2 \times \mathbb{Z}_2$.
With help from OEIS, I learned there are only $4$ possible values of $n$.
Nov
11
revised Find $n$ such that $(\mathbb{Z}/n\mathbb{Z})^\times \simeq \mathbb{Z}_2 \times \mathbb{Z}_2$.
added 106 characters in body; edited title
Nov
11
asked Find $n$ such that $(\mathbb{Z}/n\mathbb{Z})^\times \simeq \mathbb{Z}_2 \times \mathbb{Z}_2$.
Nov
7
accepted ODE satisfied by $\,f(\xi) = \int_0^1 \frac{e^{-\xi x}}{\sqrt{1 - x^2}}dx$
Nov
7
reviewed Reject ODE satisfied by $\,f(\xi) = \int_0^1 \frac{e^{-\xi x}}{\sqrt{1 - x^2}}dx$
Nov
7
revised ODE satisfied by $\,f(\xi) = \int_0^1 \frac{e^{-\xi x}}{\sqrt{1 - x^2}}dx$
edited tags
Nov
7
comment ODE satisfied by $\,f(\xi) = \int_0^1 \frac{e^{-\xi x}}{\sqrt{1 - x^2}}dx$
@GitGud Look for some relationship between the first few derivatives: $f(\xi), f'(\xi), f''(\xi), \dots $
Nov
7
asked ODE satisfied by $\,f(\xi) = \int_0^1 \frac{e^{-\xi x}}{\sqrt{1 - x^2}}dx$
Nov
6
revised When is it easy to write down the Bhargava S-factorial?
added 32 characters in body
Nov
3
revised Does Hlawka Inequality follow from Triangle Inequality?
added 288 characters in body
Nov
3
asked Does Hlawka Inequality follow from Triangle Inequality?
Oct
31
answered Probability (X >Y) when X and Y have the same distribution?
Oct
29
asked What does “of independent interest” mean in math papers?
Oct
27
revised Using Dirichlet's hyperbola method and Dirichlet's formula
reading the photograph and substantial cleaning up of text
Oct
27
revised crazy number of divisors chart on Wikipedia - $\Omega(n)$
added 467 characters in body; edited title