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
关心的是对射的证明，也就是透过在两个集合间建立
个对射（对且映成的函数）来证明它的元素个数相等。
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.
我关心的是对射的证明，也就是透过在两个集合间建立个对射（对且映成的函数）来证明它的元素个数相等。
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联网资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我
指正。
