32,663 reputation
32872
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location Vienna, Austria
age
visits member for 3 years, 1 month
seen 16 mins ago

If you have been following me around, you know that my main interests are general topology, set theory, and destroying users who post nothing but inane gibberish. The last is certainly not the least!


Projects I'd like to spend some time on:

  1. replace all occurrences of "Erdös" and "Erdos" by "Erdős"
  2. completely separate the and tags (i.e., empty this list).

3h
answered Subspace of countably compact space
1d
answered What can we say about the one point compactification of a Suslin tree?
1d
answered Can we construct from $[0,\omega_1)$ a space which is strictly-Frechet with no winning strategy in $G_{np}(q,E)$?
2d
answered “internal” definition of complete regularity?
Apr
21
answered The difference of closures is a subset of the closure of differences
Apr
21
answered Bases and open covers of a topological space
Apr
20
answered difference between sequence in topological space and metric space
Apr
20
answered Close and then open a set (ie. $(int(cl(A))$). Is it A?
Apr
18
answered How to show that every Suslin tree is Frechet-Urysohn
Apr
17
answered Existence of Nested Countable Neighborhood Basis
Apr
16
answered A topological space which is Frechet but not Strictly-Frechet.
Apr
16
answered Cardinality of $\lim_{k\to\infty}\mathbb N^k$ vs. $\mathbb N^\infty$
Apr
15
answered Give an example of non-normal subspace of a normal space.
Apr
15
answered Is this an example of a sequential non-Fréchet–Urysohn space?
Apr
15
answered Is every Extremally Disconnected Hausdorff Space Regular?
Apr
14
answered Question concerning a statement about separability
Apr
14
answered Stone-Čech compactification using ultrafilters
Apr
11
answered Property of normal spaces
Apr
11
answered Is the following proof of: $X = [0,\omega_1]$ does not satisfy $S_1(\Omega,\Gamma)$ correct?
Apr
11
answered Constructing PDA for a language