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MarnixKlooster ReinstateMonica's user avatar
MarnixKlooster ReinstateMonica's user avatar
MarnixKlooster ReinstateMonica's user avatar
MarnixKlooster ReinstateMonica
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(Except I encourage you to read an ex-moderator's https://meta.stackexchange.com/q/336526/157152 note.)

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13
Proof: $A \neq \emptyset \implies A \nsubseteq \emptyset $
Mar 16, 2013
12
Online tools for checking validity of classical, intuitionistic, ... logic formulas?
Feb 2, 2015
11
how to prove $f^{-1}(B_1 \cap B_2) = f^{-1}(B_1) \cap f^{-1}(B_2)$
Oct 6, 2013
10
Prove that $\mathcal{P}(A)⊆ \mathcal{P}(B)$ if and only if $A⊆B$.
Mar 16, 2013
10
Prove every odd integer is the difference of two squares
Dec 29, 2013
8
Why so many 'multi-part' definitions, as opposed to 'unified' ones?
Feb 15, 2016
7
Direct proof of empty set being subset of every set
Jan 8, 2014
7
What is the pattern in these ordering properties?
Apr 26, 2017
7
Prove/Disprove that if two sets have the same power set then they are the same set
Mar 16, 2013
6
Is this alternative definition of 'equivalence relation' well-known? useful? used?
Jun 20, 2013
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22
Should I fix my 175 posts that use \newcommand without \begingroup?
5
Please delete misspelled (ananlysis) tag
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243
How do I get the 'clear' command in Cygwin?
201
How do I get the 'clear' command in Cygwin?
149
Explain "claims-based authentication" to a 5-year-old
59
IIS application using application pool identity loses primary token?
38
Why isn't D the "most central" note?