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Apr
7
reviewed Close Simplifying $\arctan\left(\frac{1}{\tan \alpha}\right)$
Apr
6
reviewed Leave Open Every prime is maximal in a Jacobson ring?
Apr
6
reviewed Close $\frac{1}{2}!$ aka $\Gamma(\frac{3}{2})$
Apr
5
reviewed Close Can modulo(remainder) be distribute over division?
Apr
5
reviewed Leave Open Evaluating $ \sum_{n=1}^\infty \frac{1}{n^2 2^n} $
Apr
5
reviewed Close Floor and Ceiling Proofs
Apr
5
reviewed Leave Closed Projection of a Jinc is a Sinc
Apr
5
reviewed Leave Open Proving real polynomials of degree greater than or equal to 3 are reducible
Apr
5
reviewed Leave Open Examples of functors that preserves products but not equalizers, and vice versa.
Apr
5
reviewed Close How to show that an object is a discrete valuation ring? (Fulton, Exercise 2.14)
Apr
5
reviewed Close What is $2^{7!}\bmod{2987}$
Apr
5
reviewed Close If $p,q$ are prime, solve $p^3-q^5=(p+q)^2$.
Jan
23
reviewed Close In a group of order 21, every normal subgroup is cyclic
Jan
23
reviewed Close Separable spaces and functions that separate points
Jan
20
reviewed Close How to understand the regular cardinal?
Jan
20
reviewed Approve mantel theorem bipartite graphs, two triangles share an edge
Jan
19
reviewed Close I need help to evaluate this definite integral.
Jan
19
reviewed Close Solve 10 base logarithms
Jan
19
reviewed Close Forming equations for exponential growth/decay questions
Jan
19
reviewed Looks OK Let $G$ be a group, and $H$ a subgroup of $G$. Let $a, b \in G$. Prove $Ha=Hb$ iff $ab^{-1} \in H$.