Category
Trivia
The names, facts, and curiosities every mathematician collects.
Mathematics has a history, a cast of characters, and a stock of names, constants and famous results that every mathematician picks up eventually, mostly by accident.
These questions cover notation and where it came from, constants and their values, famous theorems and open problems, and the people behind them. They are short by design — a warm-up, or a way to fill in the gaps nobody teaches directly.
Latest problems
52 problems
Graph theory lemma
1065
30
A relation for cyclic quadrilaterals
1305
33
An unexpectedly equilateral triangle
1448
30
Flux through a closed surface
1352
24
Mean versus mean
982
52
Primes of a special form
1185
33
The triangle inequality for norms
1453
29
A closed curve and the region it bounds
1197
32