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Historical Mathematics
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Demonstrations 221  240 of 314
Relatively Prime Numbers and Zeta(2)
Finding the Least Common Multiple of Two Numbers by Factoring
A 2pire Map
The Ratio Theorem
Finding the Greatest Common Divisor of Two Numbers by Factoring
Intersecting Chords Theorem
Opposite Angles of a Quadrilateral in a Circle
Ramsey(3,3) = 6
Ramsey(3,3,3)>16
The Pigeonhole Principle  Repunits
The Primes Are Infinite
FourColor Maps
Pythagorean Analogs for Similar Triangles
3n+1 Flying Saucers
Pythagorean Means
OneTerm Nestedly Recursive Functions
A Path through the Lattice Points in a Quadrant
Beraha's Conjecture and Cyclic Graphs
Bell Number Diagrams
State Emphasis for 2,3 Turing Machine 596440
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