Tomás

less info
meta site favicon meta user | stack exchange network profile network profile
4,631 reputation
2525
bio website
location Brazil
age
visits member for 8 months
seen 2 hours ago
stats profile views 726

164 Answers

newest activity votes
6
A question about curves in $\mathbb{R}^2$
oct 4 at 15:58
6
About the positivity of the inner product on $L^2[0,1]$
oct 3 at 11:31
5
Counterexample for the solvability of $-\Delta u = f$ for $f\in C^2$
feb 14 at 16:05
5
The inclusion of Sobolev spaces
feb 24 at 1:48
5
Do diffeomorphisms act transitively on a manifold?
oct 2 at 0:47
5
Different methods to compute $\sum\limits_{n=1}^\infty \frac{1}{n^2}$
sep 27 at 17:20
4
$\Delta u = \operatorname{div}f \ \ \mbox{in} \ \ B_1, f \in L^2 \Rightarrow \nabla u \in L^2$
jun 13 at 23:21
4
Dirac Delta or Dirac delta function?
may 18 at 23:33
4
Hahn-Banach theorem (second geometric form) exercise
apr 30 at 19:57
4
If $\mathrm{Int}(\mathrm{Im}(f(\mathbb {R^n})))=\varnothing$ then the determinant of the Jacobian matrix is zero.
dec 11 at 16:25
4
$\ell_p$ is Hilbert space if and only if $p=2$
oct 18 at 18:38
3
Show harmonic function is constant on $\mathbb{R}^n$
3h ago
3
Need explanation of passage about Lebesgue/Bochner space
jun 12 at 19:34
3
variational question
jun 3 at 23:12
3
weak solution of biharmonic equation
jun 4 at 23:55
3
Continuity of function given as a maximum
jun 4 at 12:50
3
Bounded vector field has globally defined flow
may 31 at 23:09
3
problem from PDEs, H. Brezis
may 14 at 14:54
3
How do we define the $L^p$ norm of a tempered distribution?
may 12 at 18:03
3
Elliptic regularity - nonlinear case
apr 29 at 22:21
3
showing $W^{s,p}(\mathbb{R}^n) \subseteq W^{r,p}(\mathbb{R}^n)$ for $r < s$
mar 19 at 12:39
3
Does it make sense to talk about $L^2$ inner product of two functions not necessarily in $L^2$?
mar 12 at 16:52
3
Do weak convergence and convergence of norms imply convergence in $L^2$?
dec 26 at 14:07
3
Question about Lee's Introduction to Topological Manifolds
oct 21 at 14:51
3
Prove/Disprove: For any sets A and B, $(A \cup B)^c = A^c \cap B^c$
sep 25 at 16:18
3
Give an example of a function $f: \mathbb{R} \to \mathbb{R}$ which is continuous only at $0$.
oct 16 at 21:11
3
If $f$ is a bounded tempered distribution and $g \in L^1$ is then $\int_{\Bbb R^n}(f\ast\tilde\varphi)(x)\tilde g(x)\,dx$ a tempered distribution?
oct 3 at 0:23
2
A type of local minimum (2)
jun 14 at 12:33
2
$\Delta u = f, f \in L^q \Rightarrow u \in W^{2,q}$ References
jun 12 at 14:37
2
A problem about mollification
jun 3 at 14:28
1 2 3 4 5 6