Evariste
  • Member for 6 years, 8 months
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3 answers
12 votes
687 views
9 bookmarks
What is a simple definition of the pullback of a section?
1 answers
7 votes
157 views
1 bookmarks
Closed form for $\int_0^R \frac{dx}{\sqrt{\ln(1+x)}}$, R>0
3 answers
5 votes
136 views
1 bookmarks
Determinant of a specific $n\times n$ matrix
1 answers
5 votes
2k views
1 bookmarks
Infinite exponentiation $n^{n^{n^{...^n}}} \equiv m \pmod q$ , find m?
1 answers
4 votes
311 views
3 bookmarks
When is it true that if a section vanishes on a dense open set then it is the zero global section?
3 answers
3 votes
87 views
Is there a slick argument to prove that, for $n>6$, $2(n-2)!=2^kk!(n-2k)! \implies k=1$?
2 answers
3 votes
152 views
1 bookmarks
Basis of extension of scalars
1 answers
3 votes
44 views
If $A \subsetneq B$, is it always true that $A \otimes_kC \subsetneq B\otimes_kC$? ($C$ non-trivial)
1 answers
3 votes
153 views
Deriving Bachet's duplication formula
0 answers
3 votes
64 views
What shapes do these quotients represent? Do they have a name?
1 answers
3 votes
134 views
Looking for a closed form of $I(n,m)=\int_0^{+\infty} e^{-ax^n-\frac{b}{x^m}} \, dx$
1 answers
2 votes
317 views
1 bookmarks
Does every non-empty closed subset of a scheme $X$ contain closed points in $X$ ($X$ not necessarily quasi-compact)
2 answers
2 votes
100 views
2 bookmarks
If $p$ is a closed point then $X-p$ is not an affine scheme
1 answers
2 votes
36 views
If $L/K$ is a finite separable extension and $P \in K[X], Q \in L[X]$, then $P = Q^n \Rightarrow Q \in K[X]$
0 answers
2 votes
130 views
Provide a three-fold connected non-regular covering of $\mathbb{S}^1 \vee \mathbb{T}^2$ along with its projection
1 answers
2 votes
691 views
2 bookmarks
What are the semi-direct products of $\mathbb{Z}$ with itself? (Check my work please)
1 answers
2 votes
77 views
1 bookmarks
Algorithm for computing the $n$-th root of any polynomial with detached coefficients
0 answers
1 votes
47 views
Probability of brownian motion trajectory
1 answers
1 votes
36 views
Kernel of complex tori morphism, is this elementary assertion true?
0 answers
1 votes
34 views
$\mathbb{Q}(\sqrt{r},\sqrt{q})$ is unramified over $\mathbb{Q}(\sqrt{rq})$ for $r \equiv1 \pmod4$ and $q \equiv3 \pmod 4$
1 answers
1 votes
99 views
Do additive functors preserve exact sequences of $O_Y$-modules which are only locally split?
1 answers
1 votes
39 views
If $R = k[T_0,\cdots,T_n]/I$ is integral, then $\text{dim Proj R}=\text{dim D}_+(T_i)$ for some $i$
1 answers
1 votes
43 views
Do quaternion algebra isomorphisms conserve norms?
1 answers
1 votes
207 views
Prove that this map is a submersion (check my work please)
1 answers
1 votes
340 views
1 bookmarks
Showing that two quotient spaces are homeomorphic
1 answers
1 votes
364 views
Describing the Galois group of $\mathbb{Q}(\sqrt{2},\sqrt{3})$ without computing the extension degree (proof check please)
1 answers
1 votes
145 views
Intersection of sigma-algebra generators
2 answers
1 votes
77 views
Finding a $C^1$ solution to a differential equation.
0 answers
1 votes
50 views
Finding the bounds for a triple integral
0 answers
1 votes
25 views
Simple argument to generalize an identity?