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Ed Pegg Jr
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Demonstrations 1  20 of 365
Horizontal and Vertical Line Tests
Updated this month
Bad Fraction Simplification
Dice Transitivity
Substitution Tilings
General Parabola Equation
FourPoint Parabolas
Percentages are Reversible
Apollonian Edge Circles
Magic Squares and Designs
The Set of Sets in SET
Wichmann Columns
Plain Bob Bell Ringing
Patterns from de Bruijn Sequences
Multiple Nets of a Triangular Dipyramid
Sparse Rulers
Factorizing Mersenne Numbers
Observed Distribution of Random Chord Lengths in a Circle
Wichmannlike Rulers
Lighthouses
The Statue of Regiomontanus
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