Also known as identity map, identity transformation, identity operator, id, identity relation
function that always returns the same value that was used as its argument
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Graph of the identity function on the real numbers
In mathematics, an identity function, also called an identity relation, identity map or identity transformation, is a function that always returns the value that was used as its argument, unchanged. That is, when
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).