不ふ定てい方ほう程てい式しき

noun

indeterminate equation

A mathematical equation with more than one unknown, having infinitely many solutions unless further constraints are given.

• 不ふ定てい方ほう程てい式しきの解かいを整せい数すうに限げん定ていすると、ディオファントス方ほう程てい式しきと呼よばれる。

  When the solutions of an indeterminate equation are restricted to integers, it is called a Diophantine equation.