MathOverview
Reputation
5,817
67/100 score
 Jan 22 reviewed Close The Three Subjects Jan 22 revised Proving $proj_{proj_{\vec u} \vec v} \vec v=proj_{\vec u} \vec v$ added 143 characters in body Jan 22 awarded Notable Question Jan 7 comment Prove that $\frac{a}{\sqrt{a^2+1}}+\frac{b}{\sqrt{b^2+1}}+\frac{c}{\sqrt{c^2+1}} \leq \frac{3}{2}$ What is the meaning of the symbol $\sum_{cyc}$? Dec 28 revised Prove that $5^n + 2\cdot3^{n-1} + 1$ is multiple of $8$ added 83 characters in body; edited tags Dec 15 reviewed Approve Find transitive relations Dec 15 reviewed Reject Proof Check in Algebra Nov 22 reviewed Close How many integers between $10000$ and $99999$, inclusive, are divisible by $3$ or $5$ or $7?$ Nov 22 reviewed Close Uniformly continuous function bounded by A+bx Nov 22 reviewed Close Let $A = \{2,3,4\}$ and $B = \{a,b\}$. List elements of $A\times B$. Nov 22 reviewed Leave Open Prove that $\sqrt[3]5 - \sqrt[4]3$ is Irrational Nov 22 reviewed Close Evaluate $\int_a^b(x-a)^3(b-x)^4 dx$ Nov 22 reviewed Leave Open Could you find limit without using l'Hôpital? Nov 22 reviewed Close Set of permutations of $14$ elements in $S_{14}$ Nov 22 reviewed Close Prove if $7\mid a^2+b^2 \longrightarrow 7\mid a$ and $7\mid b$ Nov 22 reviewed Close Assume D is bounded and f is uniformly continuous on D. Prove that f(D) bounded Nov 22 reviewed Close proof that translation of a function converges to function in $L^1$ Nov 19 revised Exists $y \in K$ such that $\|y-x_0\|=\inf\{\|x-x_0\| :x \in K\}$ for disjoint closed sets $K$ and the set of $\{x_0:\|x_0\|≥b\}$ added 3 characters in body; edited title Nov 19 revised Exists $y \in K$ such that $\|y-x_0\|=\inf\{\|x-x_0\| :x \in K\}$ for disjoint closed sets $K$ and the set of $\{x_0:\|x_0\|≥b\}$ added 3 characters in body; edited title Nov 11 awarded Yearling