Robert Israel
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# 215,655 Reputation

203 today
 +45 21 mins ago 4 events Invertibility of $BA$ +35 1 min ago 3 events How to determine when a rounded sequence “converges” and what the convergence value is +30 2 hours ago 3 events Singular idempotent matrices +30 / -2 2 hours ago 4 events Prove that ${2^n-1\choose k}$ is always odd. +20 3 hours ago 2 events How tight is this trace inequality? +15 18 hours ago accept Domain and range of Composite function. +10 1 hour ago upvote Should we re-define Sine? +10 2 hours ago upvote sum of two sequences of functions converging in measure still converges in measure +10 12 hours ago upvote Functions similar to Log but with results between 0 and 1
35 yesterday
 +15 14:23 accept Let $X$ be a standard normal random variable. Then, $P(X<0\mid |[X]| = 1)$ is equal to? +10 19:50 upvote Problem Requiring Little Picard's Theorem +10 09:56 upvote Extreme points of the unit ball of the space $c_0 = \{ \{x_n\}_{n=1}^\infty \in \ell^\infty : \lim_{n\to\infty} x_n = 0\}$ +15 / -15 21:06 2 events Is it possible for an antiderivative to exist but not to be equal to the integral?
90 2 days ago
 +20 08:18 2 events How to precisely define a function that chooses randomly from a finite set? +20 06:01 2 events Let $X$ be a standard normal random variable. Then, $P(X<0\mid |[X]| = 1)$ is equal to? +10 14:21 upvote Prove that if $(ab)^i = a^ib^i \forall a,b\in G$ for three consecutive integers $i$ then G is abelian +10 14:19 upvote If $a$ and $b$ are roots of $x^4+x^3-1=0$, $ab$ is a root of $x^6+x^4+x^3-x^2-1=0$. +10 09:09 upvote Extreme points of the unit ball of the space $c_0 = \{ \{x_n\}_{n=1}^\infty \in \ell^\infty : \lim_{n\to\infty} x_n = 0\}$ +10 06:30 upvote Problem regarding polynomials and partial derivatives +10 02:42 upvote $A^2$ is bounded $\implies$ $A$ is bounded?
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