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Andreas Blass

Apparently, this user prefers to keep an air of mystery about them.

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137 Why do we not have to prove definitions? Aug 17 '15
78 Division by $0$ and its restrictions Dec 2 '17
73 not both $2^n-1,2^n+1$ can be prime. Jul 25 '13
55 Doesn't the unprovability of the continuum hypothesis prove the continuum hypothesis? Sep 26 '17
54 Why are modular lattices important? Jul 15 '13
50 Can proof by contradiction 'fail'? Mar 29 '16
47 What is limit superior and limit inferior? Jun 17 '13
37 In a proof by contradiction, how do we know the assumption is the cause of the contradiction? Oct 6 '17
36 Can the difference of 2 undefined limits be defined? Nov 11 '17
35 If there are $74$ heads and $196$ legs, how many horses and humans are there? Apr 19 '16
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