Monthly Archives: March 2026

Friday Notes (Mar 13, 2025)

Pardon me for going momentarily meta, but these three-paragraph opens (hopefully with a pithy cliffhanger punchline for the third) are sometimes a real challenge. The intent is a recognizable style that acts like a watermark.

Some opens are more challenging than others, though. The right half-dozen or so sentences comprising three thoughts (with a hoped-for haiku-like third) can take forever to whip into shape.

Friday Notes are among the hardest because there isn’t much to say other than “here we go again…”

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Heechee Numbers

Something old and something new collided last week in a way that I found very engaging. The old was a science fiction series I read long ago, the Heechee saga by Frederik Pohl (1919-2013). What’s relevant here is that the alien Heechee used a number system based on prime numbers.

The new was this recent Substack post by Richard Green, a math writer and teacher. It, too, features a system based on primes, and I realized it solves a problem that has long bothered me about the putative Heechee number system.

Let me explain…

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