Sh4pe

less info

network profile

681 reputation

18

bio	website
	location
	age
visits	member for	1 year, 9 months
	seen	May 13 at 13:01
stats	profile views	89

summary answers questions tags badges favorites bounties reputation activity

38 Questions

votes activity newest

8	Is every open, bounded and simply connected subset of $\mathbb{R}^n$ essentially a ball?
7	Is the Laplacian surjective on $C_0^{\infty}$?
6	Counterexample for the solvability of $-\Delta u = f$ for $f\in C^2$
6	Kernel of the product $A\otimes A\rightarrow A$
5	Parallelogram law valid in banach spaces?

view more

681 Reputation

+18	Good metric on $C^k(0,1)$ and $C^\infty(0,1)$
+30	Counterexample for the solvability of $-\Delta u = f$ for $f\in C^2$
+10	Do we really need Hahn-Banach that much?
+5	Is every open, bounded and simply connected subset of $\mathbb{R}^n$ essentially a ball?

view more

7 Answers

votes activity newest

2	Find a bijection between the Cartesian Product $[m] \times [n]$ and $[m n]$
2	The role of maps in algebraic structures?
1	Good metric on $C^k(0,1)$ and $C^\infty(0,1)$
1	Image of a Linear Operators Eigenspace
0	a matrice that becomes zero when multiplied with its factor

view more

40 Tags

3 linear-algebra × 6	1 general-topology × 2
2 abstract-algebra × 6	1 eigenvectors
2 elementary-set-theory	0 functional-analysis × 12
1 real-analysis × 4	0 sobolev-spaces × 5
1 metric-spaces × 2	0 banach-spaces × 4

view more

2 Accounts

$Mathematics Stack Exchange$	Mathematics	681 rep	18
	Stack Overflow	401 rep	14

9 Badges

recent class name

Custodian	Commentator
Critic	Supporter
Yearling	Scholar
Teacher	Student
Editor

0 Active bounties

active offered earned

This user has no active bounties

52 Votes Cast

all time			by type
51	up		3	question
1	down		49	answer

Technology			Life / Arts	Culture / Recreation	Science	Other
Stack Overflow Server Fault Super User Web Applications Ask Ubuntu Webmasters Game Development TeX - LaTeX	Programmers Unix & Linux Ask Different (Apple) WordPress Answers Geographic Information Systems Electrical Engineering Android Enthusiasts IT Security	Database Administrators Drupal Answers SharePoint User Experience Mathematica more (14)	Photography Science Fiction & Fantasy Seasoned Advice (cooking) Home Improvement more (13)	English Language & Usage Skeptics Mi Yodeya (Judaism) Travel Arqade (gaming) Bicycles Role-playing Games more (22)	Mathematics Cross Validated (stats) Theoretical Computer Science Physics more (7)	Stack Apps Meta Stack Overflow Area 51 Stack Overflow Careers

site design / logo © 2013 stack exchange inc; user contributions licensed under cc-wiki with attribution required

rev 2013.5.20.691