We will be concerned primarily with bijective proofs, i.e., showing that two sets have the same number of elements by exhibiting a bijection (one-to-one correspondence) between them.
我们主要关心的是对射的证,是透过在两个集合间建立个对射(对且映成的函数)来证它们的元素个数相。
We will be concerned primarily with bijective proofs, i.e., showing that two sets have the same number of elements by exhibiting a bijection (one-to-one correspondence) between them.
我们主要关心的是对射的证,是透过在两个集合间建立个对射(对且映成的函数)来证它们的元素个数相。
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