Definition: "Mathlib" is a foundational library for programming in mathematics, aiming to be the first stable version of a math library. It provides mathematical functions, data types, and basic operations without explicit typing or type checking. The "word" 'mathlib' is a technical term from the Bible that refers to a set of mathematical symbols used in mathematics and logic (specifically, the English mathematician William Rowan Hamilton). The term is often translated as "Mathematics Library."