Definition of surjection in English:

surjection

noun

Mathematics
  • An onto mapping (see onto).

    onto
    • ‘There is a natural duality between proper surjections and proper injections and between the M and the N forms.’
    • ‘We show that nonexistence theorems for continuous surjections between continua and related results extend to almost continuous functions.’
    • ‘The function s is not a surjection because it never takes on an odd value.’

Origin

1960s: from sur-, after injection.

Pronunciation:

surjection

/səːˈdʒɛkʃ(ə)n/