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Hao Chen

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2,309

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1.8k

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Top tag

co.combinatorics

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2,500 Rep.

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27

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Yearling

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0/1

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1 post edited

6 helpful flags

111 votes cast

Questions (23)

Votes Activity Newest

32	When is an erratum necessary?
14	How many unit balls can be put into a unit cube?
10	What is known about the chromatic number for minimum-distance graphs in higher dimensions?
10	What can we learn from the newly discovered monohedral convex pentagonal tiling?
9	Neighborly family of coins

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Reputation (2,309)

+55	Work on triply periodic minimal surfaces
+40	Graph embedding that locally minimizes total edge lengths
+10	Symmetries of irregular simplices
+10	Is {6,3,7} an 'ultrahyperbolic' Coxeter group?

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Answers (22)

Votes Activity Newest

30	Generalizations of the Four-Color theorem
15	Is {6,3,7} an 'ultrahyperbolic' Coxeter group?
12	Chromatic number of graphs of tangent closed balls
11	Koebe–Andreev–Thurston theorem - where can I find a proof?
10	Coloring of the plane

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Tags (49)

51 co.combinatorics × 11	17 mg.metric-geometry × 5
31 discrete-geometry × 8	15 coxeter-groups × 3
28 reference-request × 14	15 gr.group-theory × 2
27 graph-theory × 9	15 gt.geometric-topology × 2
20 convex-polytopes × 6	13 sphere-packing × 7

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Bookmarks (53)

Votes Activity Newest Views Added

867	Examples of common false beliefs in mathematics
308	Widely accepted mathematical results that were later shown to be wrong?
106	Rediscovery of lost mathematics
94	Where are mathematics jobs advertised if not on mathjobs (e.g. in Europe and elsewhere)?
89	A curious relation between angles and lengths of edges of a tetrahedron

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Accounts (9)

	MathOverflow	2,309 rep	15 silver badges27 bronze badges
	Academia	699 rep	2 silver badges13 bronze badges
	TeX - LaTeX	345 rep	1 silver badge7 bronze badges
	History of Science and Mathematics	275 rep	1 silver badge5 bronze badges
	Mathematics	259 rep	2 silver badges8 bronze badges

Badges (26)

Recent Class Name

Yearling × 9	Good Answer
Disciplined	Benefactor
Notable Question	Promoter
Nice Question × 4	Popular Question × 2
Nice Answer × 5	Good Question

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Votes cast (111)

all time			by type
99	up		52	question
12	down		59	answer

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