John

less info

network profile

1,099 reputation

313

bio	website
	location
	age
visits	member for	1 year, 7 months
	seen	2 hours ago
stats	profile views	512

summary answers questions tags badges favorites bounties reputation activity

81 Questions

votes activity newest

10	I want to know why $\omega \neq \omega+1$.
7	What is the first cardinal number which is grearter than continuum?
7	Do we have always $f(A \cap B) = f(A) \cap f(B)$?
6	Is such space separable?
6	In set theory, what does the symbol $\mathfrak d$ mean?

view more

1,099 Reputation

+5	Is there a CCC and collectionwise normal space, that isn't paracompact?
+5	How to understand the regular cardinal?
+5	When is $[0,1]^K$ submetrizable or even metrizable?
+5	What is the first cardinal number which is grearter than continuum?

view more

12 Answers

votes activity newest

3	closure of finite unions
3	Proving that sequentially compact spaces are compact.
2	$f:X\rightarrow Y$ is a continuous surjection, $X$ and $Y$ are topological space
2	Infinite Product Space
2	Your favourite application of the Baire category theorem

view more

27 Tags

17 general-topology × 77	1 ordinals × 3
3 elementary-set-theory × 9	1 metric-spaces × 2
3 compactness × 5	1 real-analysis × 2
2 set-theory × 18	0 homework × 17
2 logic × 2	0 examples-counterexamples × 6

view more

5 Accounts

$Mathematics Stack Exchange$	Mathematics	1,099 rep	313
$TeX - LaTeX Stack Exchange$	TeX - LaTeX	155 rep	3
	Stack Overflow	101 rep
	History	101 rep	1
	Biology	101 rep

16 Badges

recent class name

Nice Question	Benefactor
Civic Duty	Tumbleweed
Yearling	Promoter
Enthusiast	Announcer
Peer Pressure	Critic

view more

0 Active bounties

active offered earned

This user has no active bounties

432 Votes Cast

all time			by type			month		week
413	up		182	question		5		2
19	down		250	answer		5		2

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 2013.5.17.690