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1d
comment Antichain on $\mathcal{P}(\omega)/fin$ of cardinality $2^{\aleph_0}$?
BTW proof in Asaf's post can be considered as a typical example of "transfer via bijection".
1d
comment Antichain on $\mathcal{P}(\omega)/fin$ of cardinality $2^{\aleph_0}$?
I will add a link to this interesting paper: Stefan Geschke:Almost disjoint and independent families. Several proofs are also listed in Countable set having uncountably many infinite subsets (math.SE). Bollobas mentions here that he often used to assign this problem to students.
2d
revised Errata database?
added (online-resources) tag
2d
suggested approved edit on Errata database?
2d
comment Errata database?
Here is a related discussion on meta.math.SE: meta.math.stackexchange.com/questions/21250/….
2d
comment Errata database?
This answer on meta.math.SE mentions Math Book Notes Wiki
Aug
12
revised Most helpful math resources on the web
edited tags
Aug
10
comment Mathematical software wish list
Related: Tools for long-distance collaboration. (And maybe also some other links listed in the comments here).
Aug
5
comment Existence of an extreme point of a compact convex set
@HaraldHanche-Olsen I believe some references on relation of AC and KM+HB can be found in answers to this question and in comments here.
Aug
5
revised Existence of an extreme point of a compact convex set
more descriptive title
Aug
5
comment Existence of an extreme point of a compact convex set
Similar question on MSE: math.stackexchange.com/questions/1384579/…
Aug
5
suggested approved edit on Existence of an extreme point of a compact convex set
Aug
2
revised Product of Positive Matrices
tex; added (metrices) tag
Aug
2
suggested approved edit on Product of Positive Matrices
Jul
30
comment Why only Normed Linear Spaces?
I am not sure whether this is what you are after, but after a bit of googling I found Normed Banach Module at Wolfram Mathworld, normed ring, Banach ring and normed group in nLab. The articles also give some references.
Jul
28
revised Online introduction to Lattice Theory?
added (reference-request) and (online-resources) tags (the post has been bumped anyway)
Jul
28
suggested approved edit on Online introduction to Lattice Theory?
Jul
2
revised group completion theorem by using homology fibrations
corrected to a working link
Jul
2
suggested approved edit on group completion theorem by using homology fibrations
Jun
26
revised Ref. request: Additive probability measure on $\mathcal P({\bf N})$ supplies subset of $\mathbf R$ without Baire property
deleted 5 characters in body