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olivier dot begassat dot cours at gmail dot com


Jan
16
reviewed Leave Open Metric $p := p(x,y)= \min(|x-y|, 1- |x-y|)$ $x,y \in [0,1)^2$. Prove metric space is compact.
Jan
13
reviewed Leave Open closure of a convex set in a normed linear space is convex ?
Jan
13
reviewed Close Limit of $x^2+3\sin x$ as $x$ goes to negative infinity
Jan
13
reviewed Leave Open $T^n = 0$ but $T^{n-1} \neq 0$: find basis such that $Ta_j = a_{j+1}$ for $j < n$ and $Ta_n = 0$
Jan
13
reviewed Approve functional-equations tag wiki excerpt
Jan
13
reviewed Reject functional-equations tag wiki
Dec
29
reviewed Reject Is $\{ u \in H^1(\Omega) \mid \Delta u \in L^2(\Omega)\}$ dense in $H^1(\Omega)$?
Dec
19
reviewed Approve Which convex $2n$-gons have symmetry group $D_n$ instead of $D_{2n}$?
Dec
19
reviewed Leave Open Proving function in real analysis
Nov
13
reviewed Reject $(n-1)$-alternative tensor on E are decomposable
Nov
3
reviewed Close How to determine if the subset is closed under scalar multiplication and vector addition
Nov
3
reviewed Close Prove there exist sets $A, B, C, D$ with $(A \cup C) × (B \cup D) \not = (A × B) \cup (C × D)$
Nov
3
reviewed Close Confusions about Linear Algebra (determinants)
Sep
19
reviewed Approve Very basic probability problem
Sep
10
reviewed Approve Solve equation with two unknowns
Sep
9
reviewed Close How is every subset of real numbers measurable despite the existence of a non-measurable set?
Aug
2
reviewed Approve Trigonometric integral evaluation: $\int 4 \sin^4 x \cos^3 x \,dx$
Jul
31
reviewed Reject A question about Markov
Jul
31
reviewed Approve how to get the answer for the following integration?
Jul
31
reviewed Close When is the localization of a module trivial?