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Historical Mathematics
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Demonstrations 121  140 of 327
Primitive Pythagorean Triples 4: Ordered Tree Matrices
Euclid's Construction of a Regular Icosahedron (XIII.16)
Newton Polygon and Branching of Algebraic Curves
The Mayan Calendar
Arecibo Signal Generator
The Spiral of Theodorus
Slide and Swap on Cubic Graphs
Generalized Pythagoras Theorem
Archimedes's Tomb
The Fractal Nature of Partitions
Euclid's Construction of a Regular Octahedron (XIII.14)
The Function Computed by the Wolfram 2,3 Turing Machine
Thales's Theorem: A VectorBased Proof
Primitive Pythagorean Triples 2: Ordered Pairs
Primitive Pythagorean Triples 1: Scatter Plot
Hereditary Representation
Extended Euclidean Algorithm
The Pigeonhole Principle  Disk Coverings
Twin and Nearly Twin Pythagorean Triples
Pythagorean Primitive Triples Using Primes
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