Zev Chonoles

54,154 reputation

478179

bio	website	math.uchicago.edu/~chonoles
	location	Chicago, IL
	age	23
visits	member for	2 years, 10 months
	seen	4 mins ago
stats	profile views	10,669

Graduate student in pure mathematics at the University of Chicago.

My interests include algebraic geometry, algebraic number theory, and algebraic topology.

Some of my favorite quotations.

	54,154 reputation	bio	website	math.uchicago.edu/~chonoles	visits	member for	2 years, 10 months
478179 badges		location	Chicago, IL		seen	4 mins ago

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39 Questions

views newest activity votes

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808

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If every continuous $f:X\to X$ has $\text{Fix}(f)\subseteq X$ closed, must $X$ be Hausdorff?

general-topology examples-counterexamples

jan 31 '12 at 0:22 Srivatsan 15.7k

votes

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547

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How to prove that $\sum\limits_{n=1}^\infty\frac{(n-1)!}{n\prod\limits_{i=1}^n(a+i)}=\sum\limits_{k=1}^\infty \frac{1}{(a+k)^2}$ for $a>-1$?

dec 30 at 8:22 UnkleRhaukus 603

votes

answers

768

views

Is every embedded submanifold globally a level set?

differential-topology manifolds

jan 10 '12 at 17:42 Manuel Araújo 201

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333

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Why isn't $H^*(\mathbb{R}P^\infty,\mathbb{F}_2)\cong \mathbb{F}_2[[x]]$?

algebraic-topology cohomology

feb 21 '12 at 1:38 Juan S 4,665

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450

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Topology on the general linear group of a topological vector space

linear-algebra topological-vector-spaces topological-groups grassmannian

jun 21 '11 at 3:33 bartogian 161

votes

answer

322

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Finite group with isomorphic normal subgroups and non-isomorphic quotients?

group-theory

may 31 '12 at 21:16 redfiloux 346

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465

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Meaning of “efface” in “effaceable functor” and “injective effacement”

terminology cohomology abelian-categories derived-functors

apr 10 '12 at 20:58 t.b. 43.2k

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332

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Failure of isomorphisms on stalks to arise from an isomorphism of sheaves

sheaf-theory

mar 4 '12 at 2:17 student 31

votes

answer

323

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How badly can Krull's Hauptidealsatz fail for non-Noetherian rings?

commutative-algebra

oct 18 '10 at 7:23 Hagen 3,347

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answers

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Is there a classification of isolated essential singularities?

complex-analysis singularity-theory

may 15 at 23:07 Zev Chonoles 54.2k

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184

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Examples demonstrating that the finitely generated hypothesis in Nakayama's lemma is necessary

commutative-algebra

may 31 '12 at 19:35 Georges Elencwajg 45k

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answer

333

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Limit of a decreasing sequence of outer measures is an outer measure?

homework real-analysis measure-theory

sep 26 '11 at 9:34 Niels Diepeveen 2,213

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answers

381

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Examples of rings with ideal lattice isomorphic to $M_3$, $N_5$

commutative-algebra ring-theory order-theory ideals lattice-orders

jun 6 '12 at 21:13 rschwieb 21.1k

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answer

225

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Finite groups with periodic cohomology

homework abstract-algebra cohomology group-cohomology

jan 3 '12 at 11:58 Srivatsan 15.7k

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522

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Roots of unity and field extensions

abstract-algebra field-theory

oct 24 '11 at 0:50 Zev Chonoles 54.2k

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168

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How often does the Jacobi symbol incorrectly identify quadratic residues?

number-theory

apr 17 '11 at 10:11 chandok 2,654

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168

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Do the notions of weak and weak* convergence coincide for $\ell^1(\mathbb{N})$?

sequences-and-series functional-analysis topological-vector-spaces

may 12 '12 at 4:02 David Mitra 41.1k

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answers

908

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Drawing a thickened Möbius strip in Mathematica

geometry mathematica surfaces

dec 15 '11 at 6:01 J. M. 39k

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answer

329

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Compact submanifolds of $\mathbb{R}^n$ without boundary

differential-topology manifolds

may 15 '11 at 23:00 Robert Haraway 965

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143

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Demonstrating the value of abstracting away from elements/subsets to maps

reference-request intuition manifolds motivation

may 13 '11 at 14:28 Akhil Mathew 16.2k

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kviews

Correct usage of the phrase “In the sequel”? History? Alternatives?

soft-question terminology

sep 8 '10 at 8:36 Community♦ 1

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answers

127

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Justification for this manipulation in a proof of the first variation of energy formula

homework differential-geometry riemannian-geometry

apr 27 at 13:12 Yuri Vyatkin 2,140

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answer

294

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Why does the definition of an open subscheme / open immersion of schemes allow for an “extra” isomorphism?

algebraic-geometry definition schemes

nov 1 '11 at 19:44 Georges Elencwajg 45k

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answer

217

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Why is the Herbrand quotient of the dual $\hat{A}$ equal to the inverse of the Herbrand quotient of $A$ in this situation?

group-cohomology

sep 22 '11 at 8:11 Mariano Suárez-Alvarez♦ 53.4k

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answers

161

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Injection of $E(\mathbb{Q})_{\text{tors}}$ into $\tilde{E}(\mathbb{F}_p)$?

number-theory elliptic-curves

may 16 '11 at 2:15 Matt E 58.2k

votes

answer

139

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Isomorphism between $I_G/I_G^2$ and $G/G'$

group-theory

apr 13 '11 at 4:08 Steve D 5,270

votes

answers

162

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What is the motivation for defining both homogeneous and inhomogeneous cochains?

terminology cohomology group-cohomology

sep 23 '11 at 3:21 Matt E 58.2k

votes

answers

235

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The cohomology of finite $G$-modules

homework abstract-algebra homological-algebra group-cohomology

jun 14 '11 at 21:00 Zev Chonoles 54.2k

votes

answers

495

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Discriminant of a monic irreducible integer polynomial vs. discriminant of its splitting field

algebraic-number-theory

may 7 '11 at 19:27 Qiaochu Yuan 118k

votes

answer

264

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Is a projective (etc.) $G$-module also a projective $G'$-module?

group-cohomology

mar 2 '11 at 6:25 t.b. 43.2k