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Number Theory
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Demonstrations 21  40 of 563
Remainder Graphs
Modular Multiplication on a Circle
The Circles of Descartes
Euler's Method for Solving Linear Diophantine Equations
Differences of the Union of Two Arithmetic Progressions and Christoffel Paths
Discrepancy Conjecture
Two Enumerations of the Rationals
Loeschian Spheres
Permutations, Lehmer Code, and Lexicographic Index
Fibonacci Time
The Lucas Magic Square
Complex Quadratic Residues
Visible Lattice Points and Approximations to Pi
PowerMod Is Eventually Periodic
Visualizing the Collatz Conjecture and Some Variants
Factorizing Mersenne Numbers
Benford's Law and Data Spread
The Riemann Zeta Function in Four Dimensions
Iterating the Collatz Map on Real and Complex Numbers
Abacus
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