Alexander Gruber

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"The Egg:" Bizarre behavior of the roots of a family of polynomials.

abstract-algebra complex-analysis algebraic-geometry numerical-methods recreational-mathematics asked Oct 4, 2012 at 0:55

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178 votes

How far can one get in analysis without leaving $\mathbb{Q}$?

analysis number-theory philosophy constructive-mathematics finitism asked May 10, 2013 at 4:02

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121 votes

Is there a characterization of groups with the property $\forall N\unlhd G,\:\exists H\leq G\text{ s.t. }H\cong G/N$?

combinatorics group-theory finite-groups group-cohomology p-groups asked Dec 30, 2012 at 8:25

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116 votes

Are there real world applications of finite group theory?

abstract-algebra group-theory finite-groups big-list applications asked Mar 8, 2013 at 1:59

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115 votes

Does a four-variable analog of the Hall-Witt identity exist?

group-theory algebraic-topology intuition free-groups asked Dec 6, 2012 at 0:53

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93 votes

Results that came out of nowhere.

soft-question math-history big-list asked Jan 15, 2013 at 2:22

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83 votes

Motivation for spectral graph theory.

linear-algebra graph-theory intuition spectral-graph-theory motivation asked Feb 20, 2013 at 9:33

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39 votes

Is War necessarily finite?

abstract-algebra combinatorics algorithms permutations game-theory asked Nov 7, 2012 at 5:50

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39 votes

I missed an application deadline, but it wasn't entirely my fault. How can I still be considered?

graduate-admissions application deadlines asked Jan 13, 2013 at 22:34

academia.stackexchange.com

31 votes

Zombie outbreak on a $k$-regular graph

probability graph-theory probability-distributions stochastic-processes asymptotics asked Jul 3, 2014 at 1:40

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Top Answers

183

Why is $\frac{1}{\frac{1}{X}}=X$?

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162

Examples of finite nonabelian groups.

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Can someone explain Cayley's Theorem step by step?

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How to tell if I'm good enough for graduate school?

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Can we ascertain that there exists an epimorphism $G\rightarrow H$?

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Nice examples of groups which are not obviously groups

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More than 99% of groups of order less than 2000 are of order 1024?

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Help us identify new roles for community members

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Why can't Antoine's necklace fall apart?

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Becoming Better at Math

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Intuition on group homomorphisms

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Combinatorial proof of $\sum^{n}_{i=1}\binom{n}{i}i=n2^{n-1}$.

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Why worry about commutativity but not associativity in The Fundamental Theorem of Arithmetic?

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Should I be worried that I am doing well in analysis and not well in algebra?

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Alternative proofs that $A_5$ is simple

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Can we ascertain that there exist an epimorphism $G\rightarrow H?$

mathoverflow.net

Is a finite group uniquely determined by the orders of its elements?

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Why does the condition of a function being differentiable always require an open domain?

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Theorems with an extraordinary exception or a small number of sporadic exceptions

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This quotient space is homeomorphic to the Möbius strip?

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Six Frogs - Puzzle (order reversal using special transpositions)

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Is the Galois group associated to a random polynomial solvable with probability 0?

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How to reply to an email from a student who wants a reply instantly?

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Why is $\;n^2-\frac{n^2}{2} =\frac{n^2}{2}\;$?

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Why is $S_5$ generated by any combination of a transposition and a 5-cycle?

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Are all finite fields isomorphic to $\mathbb{F}_p$?

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Why is it important to study combinatorics?

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What does an outer automorphism look like?

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Is it bad to keep aside Lang's Algebra in graduate school?

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Choosing an advanced group theory text: concerns

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