Paul Halmos
From Wikiquote
Paul Richard Halmos (1916-03-03 — 2006-10-02) was a Hungarian-born American mathematician who wrote on probability theory, statistics, operator theory, ergodic theory, functional analysis (in particular, Hilbert spaces), and mathematical logic.
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- The only way to learn mathematics is to do mathematics.
- Hilbert Space Problem Book
- A good stock of examples, as large as possible, is indispensable for a thorough understanding of any concept, and when I want to learn something new, I make it my first job to build one.

