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15
396
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Slick proof that Coxeter groups $H_3$ and $H_4$ are finite?

Published on
#finite-groups #polyhedra #coxeter-groups
1.9k
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Separating disjoint polyhedra with LP duality

Published on
#linear-programming #duality-theorems #polyhedra
303
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Prove that any extreme point of $Q$ is an extreme point of $P$ (Proof checking)

Published on
#proof-verification #optimization #linear-programming #polyhedra
2.4k
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Show that a set is a polyhedron

Published on
#polyhedra #polytopes #convex-hulls
606
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Hexahedron congruent faces

Published on
#geometry #polyhedra #congruences-geometry
44
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Geometric meaning of dimension of $X \subset \mathbb{R}^n$

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#linear-algebra #combinatorics #optimization #polyhedra
1.1k
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On existence of polyhedra with a fixed number of edges per face

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#combinatorics #geometry #graph-theory #polyhedra
225
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Non existence of two specific polyhedra

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#geometry #graph-theory #polyhedra
52
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Boolean operations on generic polyhedrons (including non-regular) with blind holes

Published on
#boolean-algebra #computational-geometry #polyhedra
512
Views

Are there higher-dimensional tessellations touching only nearest neighbours?

Published on
#polygons #polyhedra #tessellations
213
Views

How to geometrically show that there are $3$ $D_4$ subgroups in $S_4$?

Published on
#group-theory #permutations #symmetric-groups #polyhedra #dihedral-groups
567
Views

Linear programming: extreme directions problem.

Published on
#optimization #linear-programming #polyhedra #simplex
315
Views

Why do the symmetries of a tetrahedron contain no odd permutations?

Published on
#group-theory #permutations #symmetric-groups #polyhedra
866
Views

Why are there nine regular polyhedra?

Published on
#geometry #euclidean-geometry #3d #polyhedra
330
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On convex hulls of polyhedra and transitivity

Published on
#group-theory #3d #symmetry #polyhedra #convex-hulls

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