Mathematics
Andreas Blass
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145
Why do we not have to prove definitions?
Aug 17 '15
79
Division by $0$ and its restrictions
Dec 2 '17
76
not both $2^n-1,2^n+1$ can be prime.
Jul 25 '13
57
Why are modular lattices important?
Jul 15 '13
55
Doesn't the unprovability of the continuum hypothesis prove the continuum hypothesis?
Sep 26 '17
52
What is limit superior and limit inferior?
Jun 17 '13
51
Can proof by contradiction 'fail'?
Mar 29 '16
40
Why isn't an infinite direct product of copies of $\Bbb Z$ a free module?
Mar 4 '13
40
If there are $74$ heads and $196$ legs, how many horses and humans are there?
Apr 19 '16
38
Can the difference of 2 undefined limits be defined?
Nov 11 '17
Top Meta posts
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24
Is downvoting all solutions to a question that turns out to be a duplicate an acceptable use of downvotes?
5
How to deal with quantifier abuse?
5
I've put a large bounty to get the attention or to get a good answer, I got neither.
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235
What are some examples of colorful language in serious mathematics papers?
130
Set theories without "junk" theorems?
102
Mathematical "urban legends"
90
Is it "vita" or "vitae"? Why?
80
Why are many obviously pointless papers published, or worse studied?
73
Categories First Or Categories Last In Basic Algebra?
68
Why don't authors include in their publications the duration of the research?

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