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Combinatorics
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Demonstrations 1  20 of 240
Nearest in a Crowd
New this month
Constructing a Steiner Tree for Five Points
New this month
Generating the Surreal Numbers
0/1Polytopes in 3D
Rubik's Cube
Tiling with Pentominos
Rolling a Cube on a Chessboard
Coverage Probability with the Occupancy Problem
Van der Waerden's Theorem
NowhereNeat Squaring the Square
Congruent Numbers
NoThreeinLine Problem
ErdösSzekeres Tableaux
Social Golfer Problem
Ways to Lace Your Shoes
Counting Necklaces
Polygons on n Vertices
Paths through a Grid
Pascallike Triangles Made from a Game
Simple 2Column Polyominoes on the Hexagonal Lattice
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