Besides making significant contributions to functional analysis, David Hilbert is widely regarded as the patron saint of mathematics educators.

He is considered one of the inventors of proof theory and a pioneer in the field of mathematics. One of his most significant achievements was the creation, in 1900, of a legendary collection of 23 unresolved puzzles, which has since become legendary. The problems would provide the basis for the entire field’s syllabus throughout the rest of the twentieth century. This was done with the intent of inspiring and motivating generations of mathematicians.