A Pentomino Christmas Card

In December 2019, while I was studying Pentomino Pair Oddities, I e-mailed this Christmas card to some of my mathematical correspondents:

In May 2020, Donald Knuth pointed out to me that my card could be interpreted as presaging the COVID-19 virus! When I designed the card, nothing could have been further from my mind, but … who knows?

Since then I have sent no more mathematical Christmas cards.

Last revised 2023-01-05.

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Col. George Sicherman [ HOME | MAIL ]