50

Questions

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5

11

votes

2

answers

390

views

On closed simple curve with curvature at most 1

reference-request dg.differential-geometry curves-and-surfaces

apr 14 at 7:50 katz 1,264●1●12

7

11

votes

5

answers

794

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Definition of area

reference-request euclidean-geometry classical-geometry

jan 30 at 5:15 Anton Petrunin 16.5k●41●110

4

votes

1

answer

142

views

Ultralimit versus partial limit

ultrafilters convergence point-set-topology

nov 8 at 18:54 Goldstern 5,260●1●12●27

1

10

votes

2

answers

573

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Actions on Sⁿ with quotient Sⁿ

group-actions coxeter-groups spherical-geometry

jul 29 at 13:40 David White 4,860●1●20●27

3

14

votes

0

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370

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Actions on ℍⁿ generated by torsion elements

group-actions hyperbolic-geometry algebraic-groups open-problem

dec 10 at 18:24 Greg Kuperberg 36.3k●2●116●179

2

11

votes

2

answers

262

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Which immersed plane curves bound an immersed disc?

gt.geometric-topology

jun 21 at 12:01 BS 5,313●1●12●25

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14

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0

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271

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Lipschitz constant of a homotopy

dg.differential-geometry mg.metric-geometry homotopy-theory at.algebraic-topology

jun 11 at 7:57 Anton Petrunin 16.5k●41●110

2

9

votes

1

answer

211

views

Connecting Lemma in the Alexandrov’s existence theorem.

reference-request alexandrov-geometry convex-polytopes

may 18 12 at 10:06 Anton Petrunin 16.5k●41●110

10

votes

2

answers

206

views

Acute triangulation

discrete-geometry mg.metric-geometry polyhedra

may 15 12 at 13:50 Igor Rivin 31.2k●3●37●71

4

7

votes

2

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491

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Chebyshev net in 3D

ap.analysis-of-pdes riemannian-geometry

mar 27 12 at 2:54 Anton Petrunin 16.5k●41●110