## Peter Borwein: A visionary mathematician

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Peter Borwein

Peter Borwein, former professor of mathematics at Simon Fraser University and director of the university’s Centre for Interdisciplinary Research in the Mathematical and Computational Sciences (IRMACS), died on August 23, 2020, at the age of 67, of pneumonia, after courageously battling multiple sclerosis for over 20 years.

The Notices of the American Mathematical Society has just published a memorial tribute, written by the present author, that summarizes Peter’s life and career. Here are a few highlights:

Peter Borwein is perhaps best known for discovering (often but not always with his brother Jonathan) new

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## PiDay 2023 crossword puzzle

So soon? Yes, it is that time of year again — PiDay (March 14) is just a few days away. In honor of this mathematical holy day, we present once again a crossword puzzle with an appropriate pi-related theme.

This year’s puzzle implements a new design for a mathematical crossword, which to the present author’s knowledge has never before been employed. See, for example, clue 40 Across below. In all respects, though, the puzzle conforms to the standards of New York Times crosswords. In terms of overall difficulty (Monday = easiest; Saturday = most difficult), this puzzle most likely would

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