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出典:Wiktionary
aleph number (複数形 aleph numbers)
出典:Wikipedia
出典:『Wikipedia』 (2011/03/20 00:31 UTC 版)
In set theory, the aleph numbers are a sequence of numbers used to represent the cardinality (or size) of infinite sets. They are named after the symbol used to denote them, the Hebrew letter aleph ().
aleph number