Jisho

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ぜんたんしゃ 全単射
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Noun
1. bijection​Mathematics
Wikipedia definition
2. Bijection​A bijection (or bijective function or one-to-one correspondence) is a function giving an exact pairing of the elements of two sets. Every element of one set is paired with exactly one element of the other set, and every element of the other set is paired with exactly one element of the first set. (There are no unpaired elements. ) A bijection from the set X to the set Y has an inverse function from Y to X.
Read “Bijection” on English Wikipedia
Read “全単射” on Japanese Wikipedia
Read “Bijection” on DBpedia

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