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恒等関数
出典:Wiktionary
出典:『Wiktionary』 (2026/02/10 21:54 UTC 版)
identity function (plural identity functions)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/24 15:10 UTC 版)
In mathematics, an identity function, also called identity map or identity transformation, is a function that always returns the same value that was used as its argument. In terms of equations, the function is given by f(x) = x.
Identity function