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104 Answers

newest activity votes
12
Which is the “fastest” paper-pencil method to compare $\sqrt[17]{6}$ and $\sqrt[16]{4}$?
11
Is there any matrix $2\times 2$ such that $A\neq I$ but $ A^3=I$
11
A kind of converse of Lagrange's Theorem
9
Regular Polyhedrons
9
Is my proof that $(A^n)^{-1} = (A^{-1})^n$ correct?
9
Book/tutorial recommendations: acquiring math-oriented reading proficiency in German
8
An example for a calculation where imaginary numbers are used but don't occur in the question or the solution.
8
If $f$ and $g$ integrable then $\max\{f,g\}$ is?
7
Does the operation of $G/A$ on $A$ by conjugation just give a trivial homomorphism?
6
Pseudo Proofs that are intuitively reasonable
6
Why do these two presentations present the same group?
6
Dihedral Group - Internal Direct Product
6
Largest Normal subgroup
6
Meaning of, and how to verify, a vector space *over* $\mathbb{R}$
6
Reference for Quantum groups
6
Is non-standard analysis worth learning?
5
Wedge product of Hochschild Cohomology classes in characteristic 2
5
Elementary books by good mathematicians
5
Small Question on the Tor functor
5
Two questions about $KG$-modules
5
What do higher cohomologies mean concretely (in various cohomology theories)?
5
Let a|c and b|c such that gcd(a,b)=1, Show that ab|c
5
Isomorphism between group algebras
4
Lie algebras from differentiation
4
$H^1$ of $\Bbb Z$ as a trivial $G$-module is the abelianization of $G$
4
Proving a Lie algebra is simple
4
Derivations of Polynomial Algebra
4
Finding the asymptotics of a summation $\sum_{k=1}^{n}\frac{n-k+1}{k}$
4
Interpretations of the first cohomology group
4
A question about bounding character ratios
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