Rényi's polynomial is the polynomial
(Rényi 1947, Coppersmith and Davenport 1991) that has 29 terms and whose square has 28, making it a sparse polynomial square.
Rényi's polynomial is the polynomial
(Rényi 1947, Coppersmith and Davenport 1991) that has 29 terms and whose square has 28, making it a sparse polynomial square.
Weisstein, Eric W. "Rényi's Polynomial." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/RenyisPolynomial.html