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Nov
6
reviewed Approve I love maths, but my school is limited in its teachings.
Oct
31
reviewed Leave Open Negative index coefficients of Laurent series for 1/sin(z)
Oct
31
reviewed Leave Open Funny problem. How to average over periodic numbers
Oct
31
reviewed Edit Example of non fractional ideal
Oct
29
reviewed Edit How to find out the linear transformation?
Oct
7
reviewed No Action Needed Is $\sum_{n=1}^\infty \frac{\sin(2n)}{1+\cos^4(n)}$ convergent?
Sep
26
reviewed Edit Showing that the direct product does not satisfy the universal property of the direct sum
Jul
28
reviewed Edit Is the coefficient ring $R$ of a group ring $RG$ necessarily projective as an $RG$-module?
Jul
10
reviewed Approve writing papers: definition in word or formula?
Jun
19
reviewed Approve If $λ \neq 0$ an eigenvalue of matrix $A$ then find an eigenvalue of $\text{adj}\left(A\right)$
Feb
26
reviewed Reopen Abstract Algebra (FUNCTIONS)
Jan
28
reviewed Leave Closed Let V be a complex vector space. If $\langle T(v),v\rangle\in \mathbb R$ for every $v \in V$, then is T self adjoint?
Jan
15
reviewed Approve Universal Generalization properties
Jan
15
reviewed Approve How to solve the following pair of equation.
Jan
15
reviewed Reject Division Rings and Division Algebras
Jan
15
reviewed Approve How to correctly do a division using a slash?
Nov
25
reviewed Close Prove by induction that $a-b|a^n-b^n$
Nov
22
reviewed Approve A question using mean value theorem
Nov
22
reviewed Reviewed Coordinate Geometry Oblique Coordinates Problem
Nov
22
reviewed Approve Cool simple solution to: $-A^2$ is not the identity matrix