As a successful Dutch mathematician, I also received honorary doctorate degrees from Cambridge and Oslo.

A leader in the area of mathematical philosophy, I challenged other mathematicians to rethink all of the mathematics they knew (or created) and how they knew it was true.

I was a prioneer in the new field of topology, the theory of aggregates, and the theory of functions.

My eponym is called the fixed-point theorem, which basically states that when a cup of coffee is stirred, there exists a point on the surface that is not moving.

As a mathematical philosopher, I rejected the classical use of deductive reasoning and created the "intuitive" school of mathematical thought to "handle" the idea of the infinite.