The story
Named after the German mathematician Eduard Heine (1821–1881) and the French mathematician Émile Borel (1871–1956).
Etymology from Wiktionary, CC BY-SA 4.0.
Heine-Borel theorem
Today it means: A theorem which states that for any subset S of an n-dimensional Euclidean space, S is compact if and only if it is both closed and bounded. Full definition →