One of the mysteries of the English language finally explained.
An onto mapping.See onto
- ‘We show that nonexistence theorems for continuous surjections between continua and related results extend to almost continuous functions.’
- ‘There is a natural duality between proper surjections and proper injections and between the M and the N forms.’
- ‘The function s is not a surjection because it never takes on an odd value.’
1960s: from sur-, after injection.
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