You've Seen 100 Species. How Many Exist?
A fingerprint reveals unseen probability mass, but support size and entropy need stronger assumptions.
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Regions for Set Inclusion
What boxes encode exactly, what Gumbel smoothing approximates, and where query geometries stop being closed.
Why 561 Passes Fermat's Test
From Fermat pseudoprimes to Miller-Rabin, BPSW, and primality certificates.
A Difference Table Is a Discrete Derivative
Difference tables peel away polynomial growth one degree at a time, while their left edge rebuilds the sequence.
Passive WiFi Channel Hopping as Active Sensing
Why packet-rate bandits do not by themselves solve transient-event discovery in passive WiFi monitoring.
Common on the Board, Rare in English
Boggle board frequency is measurable; whether a word earns points also depends on scoring, recall, and opponents.