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May
26
reviewed Close Ring theory, isomorphism proof.
May
26
reviewed Close Semi projective modules
May
23
reviewed Edit Show that the set $\{1,2,\ldots, n-1\}$ is a group under $\bmod n$ IFF $n$ is prime.
May
23
reviewed Reject and Edit Solving the integral $\int_{-\infty}^{\infty} (1+x^2)^{-3/2}$ with $\sinh$, $\cosh$?
May
22
reviewed Approve Find and classify the singularities of $f(z)$
May
21
reviewed Approve Proof cube & trapezium a Compact Space & $E^n$ & $I^n, I^{\infty}$ are connected space ???
May
20
reviewed Reject What does $\mathbb{R} \setminus S$ mean?
May
18
reviewed Leave Open How to parametrize the curve $y^2 = x^2(x+3)$
May
18
reviewed Close limits, $x \to 1$ and $n \to \infty$
May
18
reviewed Close $\sqrt{y}+\sqrt{x}=\sqrt{A}$ … prove that x-intercept + y-intercept of any tangent = constant
May
18
reviewed Close How to solve for $y$ the equation $x= y^y$?
May
18
reviewed Close What is the best method to calculate the mean for sales of a product over a period of time?
May
18
reviewed Close Find all $2 \times 2$ matrices ${A}$ that have the property that for any $2 \times 2$ matrix ${B}$, ${A} {B} = {B}{A}.$
May
18
reviewed Leave Open Rudolff's symbol for unknown
May
18
reviewed Close Looking for handy arithmetic tricks
May
18
reviewed Close Show that for $1 \leq p < \infty$ the normed linear space $\ell^p$ provided with the norm below is a Banach space.
May
18
reviewed Leave Open If $f = u + iv$ is entire and $|u(z)| > |v(z)|$ for all $z$, is $f$ constant?
May
18
reviewed No Action Needed Is it possible to create a completely random integer between 1 and 13 using standard dice in a D&D dice kit?
May
14
reviewed Close Prove that $ A = - A^{\top} $ and $ \text{rank}(A) \leq 1 $ imply $ A = \mathbf{0} $.
May
14
reviewed Reject Consider I'm a 10 year old kid, explain what “linearly independent” and “basis” means