The story
Named after Arthur Herbert Copeland and Paul Erdős, who published a related proof in 1946.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: An irrational constant that is the concatenation of "0." with the base-10 representations of the prime numbers in order, i.e. approximately 0.235711131719232931374143... Full definition →
Named after Arthur Herbert Copeland and Paul Erdős, who published a related proof in 1946.
Etymology from Wiktionary, CC BY-SA 4.0.