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Maneuvering with limited moves on $S^2$

mg.metric-geometry

may 6 11 at 11:30 APG 241●2●2

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7

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0

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Minimal spanning tree of a point set in the unit square, under an unusual distance function

mg.metric-geometry co.combinatorics

apr 22 at 18:54 Eric Tressler 909●6●14

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When can the Cheeger constant be well-approximated by ``Hamming balls''?

graph-theory co.combinatorics spectral-graph-theory cheeger-constant

sep 26 at 18:30 Eric Tressler 909●6●14

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Do the base 3 digits of $2^n$ avoid the digit 2 infinitely often — what is the status of this problem?

nt.number-theory co.combinatorics

jul 31 10 at 5:43 Gerry Myerson 15.6k●1●47●87

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3

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Elementary problem about triangles inside a convex polygon

elementary geometry

aug 7 10 at 22:03 Jorge Miranda 116●1●2●7

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What recent discoveries have amateur mathematicians made?

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Monochromatic triangles in every two-coloring of the plane?

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3

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3

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Questions

Maneuvering with limited moves on $S^2$

Minimal spanning tree of a point set in the unit square, under an unusual distance function

When can the Cheeger constant be well-approximated by ``Hamming balls''?

Do the base 3 digits of $2^n$ avoid the digit 2 infinitely often — what is the status of this problem?

Elementary problem about triangles inside a convex polygon

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