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visits member for 4 years, 7 months
seen Mar 3 at 14:34

Jan
25
awarded  Yearling
Dec
29
comment Natural numbers in set theory is {0,1,2,…}?
$\mathbb{N}$ is defined as the intersection of all inductive sets.
Dec
27
revised Natural numbers in set theory is {0,1,2,…}?
added 383 characters in body
Dec
23
asked Natural numbers in set theory is {0,1,2,…}?
Aug
22
awarded  Popular Question
Aug
19
awarded  Popular Question
Jul
2
awarded  Curious
Dec
3
accepted Sample space of the Monty Hall problem
Dec
2
asked Sample space of the Monty Hall problem
Sep
13
comment Finding the mean and Std Dev from Geometric probability
Just use the formula for P(X = x) in the formula for mean and std. deviation and simplify.
Sep
13
comment a normed vector space is normed closed iff it is weakly closed.
This question seems to have been posted before: math.stackexchange.com/questions/449301/…
Aug
23
awarded  Yearling
Jun
30
accepted Finitely many non-convergent ultrafilters
Jun
30
comment Finitely many non-convergent ultrafilters
Thanks. As you can tell, my intuition of ultrafilters sucks. I find your explanation using $\beta X$ intuitive, except that I don't see how the neighborhoods in $\beta X$ relate back to the elements inside the ultrafilters.
Jun
30
asked Finitely many non-convergent ultrafilters
Jun
5
accepted Non-convergent ultrafilter on $[0,\infty)$
Jun
5
comment Non-convergent ultrafilter on $[0,\infty)$
Well that was easy. Why do I complicate my life all the time...
Jun
5
asked Non-convergent ultrafilter on $[0,\infty)$
Jun
5
awarded  Informed
May
27
accepted Characterization of proper maps using filters