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Ed Pegg, Jr
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Demonstrations 1  20 of 322
Tetrahedron Centers
New this month
Regular Tetrahedra formed by Lattice Points Equidistant from the Origin
New this month
Mondrian Art Problem
Ponting Square Packing
Canonical Polyhedra
The Klein Configuration
Magic Squares and Designs
Four Points Determine a Sphere
Factorizing Mersenne Numbers
Using Bernoulli's Formula to Sum Powers of the Integers from 1 to n
Maximal Unit Lengths in 3D
Bitwise XOR Game
Golomb Rulers and Fibonacci Sequences
Schlegel Diagrams
Wheels of Powered Triangles
Sudoku Logic
Rational Distance Problem
Rectangles Reasonably Close to a Given Area
Triangle Radicals
Sporadic Groups
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