Reputation
Next privilege 2,500 Rep.
Create tag synonyms
Badges
1 7 29
Newest
 Fanatic
Impact
~50k people reached

Feb
5
accepted Prove that if $X$ is subgaussian, then ${\bf E}e^{tX}=1+\sum_{k=1}^{\infty}\frac{t^k}{k!}{\bf E}X^k$
Jan
13
accepted Given an algebraic curve $F(x,y)=0$, why do the partial derivatives of $F(x,y)$ being zero at a point imply the plane curve has a singularity?
Jan
13
accepted Hidden Markov Model Coin Toss Problem
Dec
17
accepted Do the singular matrices form a topological manifold
Dec
9
accepted Show that if $z\in\mathbb{E}$ is a fixed point of $\phi\in \operatorname{Aut}(\mathbb{E})$, then so is $\frac{1}{\overline{z}}$
Dec
9
accepted Constructing a (smooth) diffeomorphism between non-smooth manifolds
Dec
7
accepted Let $R$ be a Dedekind domain. If $I$,$J$ are $R$-ideals, prove that there exists an $\alpha\in I$ such that $\gcd(\langle\alpha\rangle,IJ)=I$
Dec
5
accepted Hedging a long position-one period
Dec
5
accepted Clarification about differentiable manifolds
Nov
12
accepted Given that $(X_n)_{n\geq 0}$ is a Markov Chain, prove that $(X_{kn})_{n\geq 0}$ is a Markov Chain
Nov
12
accepted Function on convex set is convex if all rays are convex
Nov
12
accepted Why doesn't $2\pi\int_{-1}^1\sqrt{1-x^2}dx$ give the surface area of a sphere of radius $1$?
Nov
12
accepted Determining an Analytic Function from its Real Part
Nov
12
accepted What can be said about $G$ non-abelian if $\mathbb{Z}_2\rightarrow G\rightarrow\mathbb{Z}_2^3$ and $Z(G)\cong\mathbb{Z}_2$?
Nov
12
accepted The Process of Choosing Projective Axes to Put an Elliptic Curve into Weierstrass Normal Form
Nov
12
accepted Prove that the sequence satisfying $a^{p^n}\equiv a^{p^{n-1}}$mod $p^n$ for $n\geq 1$, converges to the Teichmuller Representative
Nov
12
accepted Let $\mathfrak{m}$ be maximal in $R$. Show that $\mathfrak{m}^n/\mathfrak{m}^{n+1}$ is an $R/\mathfrak{m}$-vector space for all $n\geq 0$
Nov
12
accepted Help me solve this recurrence relation
Nov
12
accepted Understanding this Poisson Queueing Process
Nov
12
accepted Manipulation of probability integrals