# Olivier Bégassat

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olivier dot begassat dot cours at gmail dot com

# 1,506 Actions

 Feb7 reviewed Reject suggested edit on A weak-type submartingale inequality Feb7 reviewed Approve suggested edit on Sum of a power series with a parameter Feb7 reviewed Approve suggested edit on An automorphism on generating set of a group Feb7 comment Curve in $\mathbb{P}^{n}(\mathbb{R})$, differentiable manifolds What do you mean by curve? Feb7 reviewed Reject suggested edit on A matrix $A$ is given with a known Jordan decomposition, what is the Jordan decomposition of $A^2+A+I$? Feb7 comment Subgroup of an abelian Group @user113525 The square of $gh$ is $ghgh$ in a group, and $g^2h^2$ if $g$ and $h$ commute. Feb7 comment Prove that $\,\,\displaystyle\inf_{n\in\mathbb N}\sum_{k=0}^{p}\lvert\sin{(n+k)^p}\rvert>0$ This is an interesting idea. Feb6 reviewed Approve suggested edit on Convergence of the sequence $\frac{1}{n\sin(n)}$ Feb6 answered Are there any interesting examples of subsets of $\mathbf{N}$ that are known to be nonempty, but of which no elements are known? Feb6 reviewed Approve suggested edit on If $r = \langle x,y,z\rangle$ and $r_0 = \langle x_0,y_0,z_0\rangle$, describe the set of all points $(x,y,z)$ such that $|r - r_0| = 1$ Feb6 reviewed Reject suggested edit on Orthonormal basis in Hilbert space - 2 questions Feb5 reviewed Close A Number Theoretic Argument. Proof or counter-example! Feb5 reviewed Leave Open Fat geometric realization weakly equivalent to the usual one Feb5 reviewed Close Prove that a group where $a^2=e$ for all $a$ is commutative Feb5 reviewed Close Learning Topology Feb5 reviewed Approve suggested edit on What is the laplace transform of $e^x$ Feb5 reviewed Reject suggested edit on In the context of vectors is there a difference between the terms “magnitude” and “length”? Feb4 reviewed Approve suggested edit on Continuous and additive implies linear Feb4 reviewed Close Sub Vector space of $\mathbb{R}^2$? Feb4 reviewed Approve suggested edit on Number of subsets of a set having r elements