Stack Exchange

Steve D

Stony Brook, NY

http://www.math.sunysb.edu/~sdalton/

please delete me

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Top Questions
Top Answers
82
Can a vector space over an infinite field be a finite union of proper subspaces?
mathoverflow.net

67
Examples of eventual counterexamples
mathoverflow.net

56
Quick proofs of hard theorems
mathoverflow.net

24
Half or more elements order two implies generalized dihedral?
mathoverflow.net

22
Can the symmetric groups on sets of different cardinalities be isomorphic?
mathoverflow.net

21
How do I walk a small dog afraid of loud noises in an urban area?
pets.stackexchange.com

20
An identity for the cosine function
mathoverflow.net

18
Seeking Noetherian normal domain with vanishing Picard group but not a UFD
mathoverflow.net

13
Conjugacy classes insersecting subgroups of finite groups
mathoverflow.net

12
Generating a finite group from elements in each conjugacy class
mathoverflow.net

12
Counterexamples in Algebra?
mathoverflow.net

12
Major mathematical advances past age fifty
mathoverflow.net

12
Books you would like to see translated into English.
mathoverflow.net

12
infinite abelian group where all elements have order 1, 2, or 4
math.stackexchange.com

12
Which finite group is this?
math.stackexchange.com

11
Is a normal subgroup of a finitely presented group finitely generated or normal finitely genrated?
mathoverflow.net

11
Is there any criteria for whether the automorphism group of G is homomorphic to G itself?
mathoverflow.net

10
How many nondecreasing functions $f:\{1,2, \ldots, n\} \to \{1,2, \ldots, n\}$ with $f(i)\leq i$ are there?
math.stackexchange.com

9
Finitely presented sub-groups of GL(n,C)
mathoverflow.net

9
How would I socialise my puppy with other animals and people?
pets.stackexchange.com

9
Does injectivity of $\pi_1(\partial U) \to \pi_1(M)$ imply injectivity of $\pi_1(U) \to \pi_1(M)$?
mathoverflow.net

8
〈x,y : x^p = y^p = (xy)^p = 1〉
mathoverflow.net

8
Is residual finiteness a profinite property?
mathoverflow.net

7
Deriving a relation in a group based on a presentation
mathoverflow.net

7
Find all connected covers of $\mathbb{RP}^2 \vee \mathbb{RP}^2$
math.stackexchange.com

7
Embedding of 3-manifold $S^3/Q_8$ in $\mathbb R^4$
math.stackexchange.com

7
Diameter of the Symmetric group
math.stackexchange.com

6
Looking for an introductory textbook on algebraic geometry for an undergraduate lecture course
mathoverflow.net

6
Is a compact, connected, orientable 3-manifold with $\mathbb{Z}^K$ fundemental group uniquely determined?
mathoverflow.net

6
Infinite groups whose non-trivial subgroups are of finite index
math.stackexchange.com

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