@bucketslip32
беше тук преди 1 година, 4 месеци
The assumption that the cardinality of each infinite set is an aleph number is equal over ZF to the existence of a well-ordering of each set, which in flip is equal to the axiom of choice. In set principle, the Hebrew aleph glyph is used because the image to indicate the aleph numbers, which represent the cardinality of infinite sets. In older […] Виж