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olivier dot begassat dot cours at gmail dot com


Jan
31
reviewed Leave Open Number of paths?
Jan
30
comment Is the torus the union of two connected, simply-connected open sets?
@N.Owad that's right.
Jan
30
reviewed Approve What does “meaning” mean in Whitehead and Russell's PM?
Jan
30
reviewed Reject An apparently elementary fact about complex numbers.
Jan
30
reviewed Approve how to solve circle dividing equation (complex numbers)
Jan
30
comment Partition of integer with size constraint
There usually are no such partitions. Just take $q=2$, $n=2$ and $X=2^n$.
Jan
30
revised Čech-Stone compactification of $\mathbb N$ and ultrafilters on $\mathbb N$
added link
Jan
30
reviewed Approve Showing that $1+a>0 \implies (1+a)^n \ge 1 + na$
Jan
29
reviewed Approve Find a circle's radius with three known tangent lines
Jan
29
answered Isomorphism in homology of $\mathbb{R} P^2$
Jan
29
comment Non-zero degree on circle $\Rightarrow$ surjective on disk
Thanks for your kind reply :)
Jan
29
answered Non-zero degree on circle $\Rightarrow$ surjective on disk
Jan
28
reviewed Approve Radical equations
Jan
28
reviewed Approve Inverse Laplace transform of $(2s+4)/(s^2+4s+5)^2$
Jan
28
reviewed Approve Suppose that $f$ is uniformly continuous on $R$ and let $f_n (x)=f(x+\frac{1}{n})$. Prove that ${f_n}$ converges uniformly to $f$.
Jan
28
reviewed Approve Number of permutations, basic question
Jan
27
reviewed Approve I'm having trouble understanding this derivation
Jan
27
reviewed Reject Show existence of linear transformation from subset to subspace embedded in $\mathbb{F}_2^n$
Jan
27
reviewed Approve find a special element of $Sp(2n,q)$
Jan
27
reviewed Approve How do I mark the locus of points $P$ for which $d (P, G) = d (P, L)$?