Mathematics
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William
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View all questions and answers
All Questions Answers
Score Newest
answer
40
"Negative" versus "Minus"
Jun 11, 2012
answer
34
If $\gcd(a,b)=1$, then $\gcd(a^n,b^n)=1$
Jul 5, 2012
answer
30
Are the axioms for abelian group theory independent?
Aug 6, 2011
answer
28
Prove that every element of a finite group has an order
Sep 14, 2011
answer
27
Is $\{\emptyset\}$ a subset of $\{\{\emptyset\}\}$?
Sep 12, 2013
answer
27
Prove/Disprove that if two sets have the same power set then they are the same set
Sep 19, 2011
answer
22
How to prove that $\mathbb{Q}$ ( the rationals) is a countable set
Feb 1, 2014
answer
22
$\{1,1\}=\{1\}$, origin of this convention
Jun 8, 2012
answer
21
set in $\mathbb{R}$ which is not a Borel-set
Jul 4, 2012
question
18
Infinite Set is Disjoint Union of Two Infinite Sets
Aug 28, 2011
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