Diophantine equation
Somewhere near Diophantine equation I got lost in:
Diophantine algebraic function Diophantus Presburger Arithmetic Elephantine Number of the beast Platonic Omega Johnny the Homicidal Maniac number theory conjunctive normal form MathWorld mathematics linguistic analysis equation integer Pythagorean Triple Elliptic Curve Cryptography Hilbert Problems regular 17476-gon 3-4-5 triangle Rational Root Theorem quadratic field Candide's Voyage to Constantinople Super-Omegas NP-complete Gödel's theorem 255.255.255.255 Bernoulli number undecidable The abc conjecture Bezout's Identity Linear Diophantine equation