Chu

647 reputation

bio	website
	location	Mexico City, Mexico
	age	26
visits	member for	2 years, 4 months
	seen	May 16 at 16:43
stats	profile views	113

Math Interests: Riemannian Geometry, Geometric Analysis, Algebraic Topology. Gaming Interests: JRPG, Sandbox, FPS, Gears of War, Battlefield BC2 & 3.

	647 reputation	bio	website		visits	member for	2 years, 4 months
29 badges		location	Mexico City, Mexico		seen	May 16 at 16:43

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37 Questions

views newest activity votes

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450

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Entire functions such that $f(z^{2})=f(z)^{2}$

complex-analysis functional-equations

nov 29 '11 at 16:30 J. M. 38.9k

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answers

547

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Vector Bundles Over a Manifold

jan 30 '11 at 22:36 Mariano Suárez-Alvarez♦ 53.3k

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answers

149

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Orientable double covers for non-orientable manifolds

manifolds covering-spaces

feb 22 at 18:44 Jason DeVito 14.3k

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answer

153

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Possibilities of an action of $S^1$ on a disk.

reference-request differential-geometry lie-groups

aug 20 at 0:39 Ryan Budney 13.3k

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answer

182

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Field Extensions

homework field-theory

jan 12 '11 at 4:32 Chu 647

votes

answer

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applications of viewing some manifolds as homogeneous spaces

differential-geometry

aug 15 '11 at 14:44 Jason DeVito 14.3k

votes

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309

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What is the relation between connections on principal bundles and connections on vector bundles?

differential-geometry fiber-bundles

jun 27 '11 at 8:18 Scott Carnahan 559

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250

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For holomorphic $f$, $f(\frac{z}{2})= \frac{1}{2}f(z) \Longrightarrow f(z) = z$

homework complex-analysis

nov 10 '11 at 11:28 t.b. 43.2k

votes

answer

301

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Fixed Points Set of an Isometry

riemannian-geometry

aug 3 '11 at 21:14 t.b. 43.2k

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333

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if a complex function $f$ is real-differentiable, then $f$ or $\overline{f}$ are complex-differentiable

complex-analysis

feb 9 at 6:31 Community♦ 1

votes

answer

177

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Excercise in isometries of the half upper plane

homework riemannian-geometry

apr 23 '12 at 17:26 Community♦ 1

votes

answers

242

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sylow subgroup of a subgroup

group-theory

dec 30 '10 at 16:59 Derek Holt 8,303

votes

answer

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Systems of Differential Equations and higher order Differential Equations.

differential-equations

may 14 at 4:32 Amzoti 14.1k

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answers

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symmetric positive definite matrices

matrices differential-geometry

apr 26 at 4:24 user63788 39

votes

answers

218

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Mathematical applications of ordinary differential equations.

reference-request differential-equations soft-question

feb 28 at 5:23 KCd 5,940

votes

answers

608

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Can you extend vector fields on a manifold?

differential-geometry

feb 12 at 19:40 Javier G 1

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answers

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Equivalence of two definitions of differentiablitity on Regular Surfaces

differential-geometry surfaces

sep 8 at 10:08 levap 2,243

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112

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Relation between uniform convergence of curves in a manifold and homotopy

differential-geometry riemannian-geometry homotopy-theory

jun 6 '12 at 1:58 Neal 6,530

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answers

213

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Prove that certain quotient space is homeomorphic to an interval.

general-topology

feb 20 '12 at 18:11 savick01 1,190

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Find a couple of integers such that the third power of a given natural can be written as the difference of the squares of those integers

number-theory diophantine-equations

nov 24 '11 at 19:13 André Nicolas 162k

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answers

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Isometric actions

riemannian-geometry

aug 3 '11 at 3:36 Chu 647

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answer

521

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Riemannian metric of the tangent bundle

riemannian-geometry

jul 20 '11 at 16:35 Willie Wong♦ 30.7k

votes

answer

136

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Complex Integral

complex-analysis

jun 9 '11 at 11:52 Chu 647

votes

answer

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Convergence of a complex product series

homework complex-analysis

mar 28 '11 at 20:05 AD. 5,516

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answers

515

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Integral curves of the gradient

homework differential-geometry

jan 11 '11 at 3:38 George Lowther 11.5k

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answer

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Holonomy of the sphere

differential-geometry soft-question holonomy

apr 26 at 17:13 Fly by Night 6,014

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answer

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Isometric involutions and sections

metric-spaces

feb 20 at 4:18 muzzlator 4,911

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answer

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Definition of the rank of the isometry group of a manifold.

differential-geometry lie-groups group-actions

aug 13 at 23:57 Jonathan 1,284

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answer

106

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Meaning of the Soul Theorem

soft-question riemannian-geometry

may 23 '12 at 1:39 Chu 647

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answer

126

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First Variation Formula

riemannian-geometry

may 6 '12 at 4:40 matgaio 901