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May
22
awarded  Yearling
May
22
comment Find $\lim_{x\rightarrow\infty}\sin^2(x^2)$
@bws It sounds great, but I would add that $f(a_n)$ does not just tend toward 0, it is equal to 0 for all $n$. Similarly for $f(b_n)$.
May
22
answered Find $\lim_{x\rightarrow\infty}\sin^2(x^2)$
May
22
revised Taylor series $\ln(1+e^x)$ about $x=0$
added 3 characters in body
May
20
answered Number of ways to place $K$ objects in $N^3$ cube
May
20
answered Understanding the set of neighbors of a set
May
12
answered If every compact set is closed, then is the space Hausdorff?
May
12
comment Properties of the countable complement topology on $\mathbb{R}$.
I'm not sure it follows that $\mathbb{R} \setminus U$ is countable for open $U$. For example, take $U = \mathbb{R} \setminus [0,1]$, which is open since it's complement is the uncountable, compact set $[0,1]$.
May
12
comment Intersection of compact sets in Hausdorff space is compact
To be more precise, the proof relies on the fact that compact sets are closed. There are non-Hausdorff spaces in which all compact sets are closed, so the proof would work fine there.
May
10
comment Perfect matching problem
The concept of alternating and augmenting paths seems relevant here.
May
1
awarded  Enlightened
May
1
awarded  Nice Answer
Apr
14
revised Understanding dependency graph for a set of events
removing dead link
Mar
14
comment Number of spanning trees of a labeled graph
How do you know your solution is incorrect?
Mar
9
awarded  Nice Answer
Mar
9
revised Examples of Separable Spaces that are not Second-Countable
you seek examples of separable spaces that are not second countable
Mar
9
answered Examples of Separable Spaces that are not Second-Countable
Feb
26
revised Finite Space that is Not Normal
deleted 63 characters in body; edited tags; edited title
Feb
26
answered Finite Space that is Not Normal
Jan
20
awarded  Enlightened