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Nov
18
reviewed Edit If the number $x$ is algebraic, then $x^2$ is also algebraic
Oct
4
reviewed Approve Prove all multiples of $U$ contain all the digits $0$ to $9$
Aug
14
reviewed Approve How would I find $n^n \pmod 5$?
Jun
26
reviewed No Action Needed Compute the first six terms of the following sequences (start with n = 1):
Jun
20
reviewed Approve Derivative of rational function help.
Jun
15
reviewed Approve Group theoretical characterization of $\mathbb Q$ and $\mathbb Q^\star$
May
20
reviewed Approve Understandng euclids theorem
May
20
reviewed Edit prove that $2^{15} - 2^3 $ divides $ a^{15} - a^3$
May
18
reviewed Leave Open Which method i must use to this series (diverge or not)
May
8
reviewed Approve Would like help with a zero as constant
Apr
10
reviewed Edit mathematical biology1
Apr
4
reviewed Approve Is $n^2+1$ always a product of Pythagorean primes?
Apr
4
reviewed Leave Open Pythagorean Proof!
Apr
4
reviewed Leave Open Showing there exists a group and a homorphism
Apr
4
reviewed Close How to find this limit
Mar
1
reviewed Approve I need to understand $t=\cos(x) \implies x=\arccos(t)$
Feb
23
reviewed Approve Problem with a simple exercise
Jan
18
reviewed Reject If you have the cofactors of a matrix, how can you find that matrix from its cofactors?
Jan
12
reviewed Approve Can something like $\text{Hom}(V,K)$ be visualised?
Dec
24
reviewed Approve Tough geometry question