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# 2,066 Reputation

10 today
 +10 22 hours ago 2 events Rigorous proof that $\int_{\Omega}X\;dP=\int_{-\infty}^{\infty}xf(x)\;dx$
55 Nov 19
 +40 04:46 4 events Is there a matrix $A$ such that $rank(A) < rank(A^2)$? +10 05:19 upvote let $\alpha$ = $\sqrt[3]{2}$ and $K = \Bbb{\alpha}$ factor $x^{3} -2$ into irreducible polynomials in $K(x)$ +5 10:54 upvote Show that the countable product of metric spaces is metrizable
30 Nov 12
 +2 02:15 accept Given that $(X_n)_{n\geq 0}$ is a Markov Chain, prove that $(X_{kn})_{n\geq 0}$ is a Markov Chain +2 02:15 accept Function on convex set is convex if all rays are convex +2 02:14 accept Why doesn't $2\pi\int_{-1}^1\sqrt{1-x^2}dx$ give the surface area of a sphere of radius $1$? +2 02:14 accept Determining an Analytic Function from its Real Part +2 02:14 accept What can be said about $G$ non-abelian if $\mathbb{Z}_2\rightarrow G\rightarrow\mathbb{Z}_2^3$ and $Z(G)\cong\mathbb{Z}_2$? +2 02:13 accept The Process of Choosing Projective Axes to Put an Elliptic Curve into Weierstrass Normal Form +2 02:12 accept 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 $n\geq 0$ +2 02:12 accept Help me solve this recurrence relation +2 02:12 accept Understanding this Poisson Queueing Process +2 02:12 accept Manipulation of probability integrals +2 02:11 accept Direct construction of an arbitrary elliptic function of order $2$ with pole set contained in its lattice. +2 02:11 accept Singularities in (Elementary) Real Algebraic Geometry +2 02:11 accept Showing that $f(x)=x\sin (1/x)$ is not absolutely continuous on $[0,1]$ +2 02:11 accept Why isn't the Ito integral just the Riemann-Stieltjes integral? +2 02:10 accept Trouble seeing how Lagrange Multipliers are True
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