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Is $1+x+\frac{x^2}2+\dots+\frac{x^n}{n!}$ irreducible?

abstract-algebra polynomials asked Apr 12 '12 at 10:07

math.stackexchange.com

21 votes

When is Stone-Čech compactification the same as one-point compactification?

general-topology compactness asked Mar 20 at 13:41

math.stackexchange.com

17 votes

Chatting about mathematics (with real-time LaTeX rendering)

soft-question online-resources asked Nov 12 '11 at 15:31

math.stackexchange.com

16 votes

How to show $(a^b)^c=a^{bc}$ for arbitrary cardinal numbers?

elementary-set-theory cardinals asked Aug 14 '11 at 11:46

math.stackexchange.com

16 votes

Is it ok to send an email informing about your new paper?

publishing etiquette email asked Apr 23 at 9:02

academia.stackexchange.com

14 votes

Is there a “tree-like” proof of compactness theorem in the case of uncountably many variables?

logic set-theory compactness trees asked Apr 25 at 15:05

math.stackexchange.com

13 votes

Does there exist a 3-dimensional subspace of real functions consisting only of monotone functions?

linear-algebra real-analysis asked Jun 8 '12 at 13:56

math.stackexchange.com

10 votes

Arxiv - what should I expect

soft-question publishing asked Jul 3 '11 at 6:36

math.stackexchange.com

10 votes

Examples of “transfer via bijection”

elementary-set-theory soft-question proof-strategy big-list asked Mar 6 at 6:53

math.stackexchange.com

9 votes

Upvote to/for/on a post?

word-choice prepositions asked Apr 9 at 16:09

english.stackexchange.com

Top Answers

Given $f(f(x))$ can we find $f(x)$?

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How do we prove $\cos(\pi/5) - \cos(2\pi/5) = 0.5$ ?.

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Which is the easiest and the fastest way to find the remainder when $17^{17}$ is divided by $64$?

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Proving that $G/N$ is an abelian group

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How to Decompose $\mathbb{N}$ like this?

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What's going on with “compact implies sequentially compact”?

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Proving $n^n\geq e^{n-1}$

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Does $A=\{a|\forall x\in \emptyset\ H(x,a) \}$ make sense?

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How to show $\det(AB) =\det(A)\det(B)$

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Can decimal numbers be considered “even” or “odd”?

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Show that $\langle 2,x \rangle$ is not a principal ideal in $\mathbb Z [x]$

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Intersection of open and compact

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Percentage of primes among the natural numbers

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How to prove $1$,$\sqrt{2},\sqrt{3}$ and $\sqrt{6}$ are linearly independent over $Q$?

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To show that Fermat number $F_{5}$ is divisible by $641$.

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Prove that: $2^a+3^b<3a+4b$

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Chatting about mathematics (with real-time LaTeX rendering)

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Is $\int_0^\infty\frac{|\cos(x)|}{x+1} dx$ divergent?

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Does $\mathbb{R}^\mathbb{R}$ have a basis?

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Why does the Dedekind Cut work well enough to define the Reals?

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Useful mathematical fora

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Overview of basic results on cardinal arithmetic

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How do I define a bijection between $(0,1)$ and $(0,1]$?

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Axiom of Regularity

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Name of a book with the following contents?

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“Pseudo-Cauchy” sequences: are they also Cauchy?

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A 0-measure uncountable superset of a countable set?

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Discontinuous linear functional

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Are homeomorphisms order-isomorphisms?

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The Duals of $l^\infty$ and $L^{\infty}$

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