Who invented the brilliant $\mapsto$ notation for describing a function's action on a point, as in $x \mapsto x^2$?
This is in some sense a counterpart to Who came up with the arrow notation $x \rightarrow y$?
2026-04-06 14:43:51.1775486631
Origin of $\mapsto$ notation
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It seems that $\mapsto$ was introduced by Bourbaki between 1963 and 1964.
HSM has a full answer.