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Kevin Ventullo
Los Angeles, CA, USA
https://kevinventullo.com/
Staff Engineer at Google
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Top Questions
109
votes
Is $[0,1]$ a countable disjoint union of closed sets?
real-analysis
general-topology
analysis
baire-category
asked Oct 8, 2010 at 6:21
math.stackexchange.com
32
votes
Groups with all subgroups normal
gr.group-theory
normal-subgroups
asked May 20, 2010 at 1:57
mathoverflow.net
20
votes
Finite abelian groups as class groups
number-theory
algebraic-number-theory
asked Nov 19, 2010 at 10:06
math.stackexchange.com
18
votes
When can a (finite) group be written as the quotient of some other group by its center?
group-theory
asked Oct 3, 2010 at 6:30
math.stackexchange.com
13
votes
Expressing a number field as a composite of extensions ramified at one place
algebraic-number-theory
nt.number-theory
asked Nov 13, 2010 at 9:25
mathoverflow.net
12
votes
Drawing conclusions by NOT using AC.
fa.functional-analysis
measure-theory
set-theory
asked May 7, 2010 at 9:04
mathoverflow.net
11
votes
Do all manifolds have a densely defined chart?
general-topology
differential-topology
asked Nov 25, 2010 at 0:44
math.stackexchange.com
11
votes
Can the completion of a domain be a non-domain?
algebraic-geometry
commutative-algebra
asked Aug 25, 2012 at 0:42
math.stackexchange.com
9
votes
Injection of Ext into H^2
homological-algebra
group-cohomology
asked Oct 12, 2010 at 8:21
mathoverflow.net
8
votes
Relation between zeta value and genus of modular curve
number-theory
algebraic-geometry
riemann-zeta
asked Jun 8, 2012 at 0:08
math.stackexchange.com
1
2
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Top Answers
42
When is $n/\ln(n)$ close to an integer?
mathoverflow.net
28
Intuitive crutches for higher dimensional thinking
mathoverflow.net
23
The existence of non-trivial homomorphisms $\prod_{n=1}^{\infty}\mathbb{Z}/\bigoplus_{n=1}^{\infty}\mathbb{Z}\to\mathbb{Z}/p\mathbb{Z}$
mathoverflow.net
18
Lie Groups which are not Hausdorff
math.stackexchange.com
17
The single-plus construction is not the left adjoint of the inclusion of separated presheaves?
mathoverflow.net
17
Is every regular (excellent) scheme separated?
mathoverflow.net
17
Seeking a Geometric Proof of a Generalized Alternating Series' Convergence
mathoverflow.net
15
The Green-Tao theorem and positive binary quadratic forms
mathoverflow.net
14
Does a graph with all vertex degrees divisible by 3 contain a cubic subgraph?
mathoverflow.net
12
Proving $|f(z)|$ is constant on the boundary of a domain implies $f$ is a constant function
math.stackexchange.com
12
Can one ignore primes lying over $l$ in the Fontaine-Mazur conjecture? Counterexamples?
mathoverflow.net
12
What is the spectrum of the ring of entire functions?
mathoverflow.net
12
Prime Decomposition in Cyclotomic Z_p-extensions
mathoverflow.net
11
Existence of a Pythagorean Triple with one side given.
math.stackexchange.com
11
Free resolution dimension?
mathoverflow.net
11
Primes in a (commutative) Jacobson ring
mathoverflow.net
11
Examples where it's useful to know that a mathematical object belongs to some family of objects
mathoverflow.net
11
What are the epimorphisms in the category of schemes?
mathoverflow.net
9
Where does the principal ideal theorem (from CFT) go?
mathoverflow.net
8
Why Spec R is quasi-compact?
math.stackexchange.com
7
Why is a strict $p$-ring whose residue ring is a field necessarily local?
math.stackexchange.com
7
What is a Weil-Deligne representation?
math.stackexchange.com
7
What is the variance of the number of heads that come up when a fair coin is flipped 10 times?
math.stackexchange.com
7
Is a section of a proper map proper?
mathoverflow.net
7
Isogenous elliptic curve with integral j-invariant
mathoverflow.net
7
Describing global sections of sheafifications
mathoverflow.net
7
The restriction of a global section which is not a zero divisor is still a non-zero divisor?
mathoverflow.net
6
Minimal generation for finite abelian groups
math.stackexchange.com
6
Cardinality of the set of all paths in the infinite complete infinitary tree
mathoverflow.net
6
Graph of unbounded degree?
math.stackexchange.com
1
2
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