Anton Petrunin

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Name Anton Petrunin
Member for 4 months
Seen 3 hours ago
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Location PSU (State College, PA, USA)
Age 41
I'm doing geometry.
19

Questions
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One-step problems in geometry

mar 15 at 6:49 akopyan 141●4

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1k
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When shorter means smaller?

mar 9 at 17:35 Anton Petrunin 2,033●5●25

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663
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Diameter of m-fold cover

mar 3 at 18:44 Anton Petrunin 2,033●5●25

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710
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Minimal surface in a ball

dec 4 at 23:25 Anton Petrunin 2,033●5●25

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648
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Perpetuum Mobile

jan 24 at 14:37 Sam Nead 976●2●9

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356
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Intrinsic metric with no geodesics

mar 1 at 1:59 SpecialK 21●2

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Inverse limit in metric geometry

mar 15 at 13:30 Jean Lecureux 145●1●4

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Convex hull in CAT(0)

feb 18 at 23:11 HenrikRüping 894●1●11

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Fundamental group of 3-manifold with boundary

nov 19 at 20:11 Scott Morrison♦ 2,877●8●28

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41

Answers
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Famous mathematical quotes
18
Can a connected planar compactum minus a point be totally disconnected?
12
Which mathematicians have influenced you the most?
11
Are all polynomial inequalities deducible from the trivial inequality?
9
Rolle’s theorem in n dimensions
8
Feasibility of a list of prescribed distances in R^3
8
Your favorite surprising connections in Mathematics
8
distance regular metric spaces
7
Determination of a symmetric convex region by parallel sections
6
existence of a connected set with given connected projections.
5
Improving a sequence of 1s and -1s
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Are there any books that take a ‘theorems as problems’ approach?
4
What is best graph editor to use in your articles?
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Are isometries the only geodesic preserving maps in a CAT(0)-space?
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A generalization of Cauchy’s mean value theorem.
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Estimating flat norm distance from a planar disc
3
Is ellipse on a sphere convex? (proof)
3
Set of vectors separated by at least a specified angle
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Uniqueness of a polygon
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Representability of finite metric spaces
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mean curvature and polar tangential angle
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Four Dimensional Origami Axioms
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Example of non-closed convex hull in a CAT(0) space
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Diameter of universal cover (2)
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Which quadratic forms on $\Lambda^2 V$ come from quadratic forms on $V$?
2
Point singularity of a Riemannian manifold with bounded curvature
2
Local supporting points of Lipschitz functions
2
Notation for the all-ones vector
2
Math journal for high school students?
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