8

Questions
votes newest views recent
4
7
votes
4
answers
700
views

What kind of completion is this?

may 10 at 16:23 Chris Heunen 1,298●1●5●12

5
9
votes
0
answers
300
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Categorifications of Zorn’s lemma

nov 19 at 20:20 Chris Heunen 1,298●1●5●12

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4
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1
answer
519
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Can every nonempty set carry abelian group structure? [closed]

feb 29 12 at 16:20 Joel David Hamkins 75.5k●8●188●346

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6
votes
1
answer
881
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When are technical assumptions critical? [closed]

nov 14 11 at 18:01 Michael Greinecker 3,914●1●11●26

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4
votes
1
answer
595
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When is this map completely positive?

may 11 11 at 12:06 Mikael de la Salle 3,456●5●16

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22
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7
answers
2k
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Why don’t ideals and quotients work well for categories?

apr 3 11 at 18:20 Dylan Rupel 21●1

 
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vote
1
answer
157
views

Are these ideals in rings of operators on Hilbert space unique?

mar 4 11 at 19:54 Bill Johnson 14.4k●1●33●60

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2
votes
2
answers
250
views

Associativity of polar decomposition

dec 8 10 at 22:28 Chris Heunen 1,298●1●5●12