onto

See also ónto

English

Preposition

onto

1. Upon; on top of.

   My cat just jumped onto the keyboard.

2. (informal) Aware of.

   The thought-police were onto my plans of World domination.

3. (mathematics) Being an onto function with a codomain of (see below).

   The exponential function maps the set of real numbers onto the set of positive real numbers.

Adjective

onto (not comparable)

1. (mathematics, of a function) Assuming each of the values in its codomain; having its range equal to its codomain.

   Considered as a function on the real numbers, the exponential function is not onto.

Synonyms

• (mathematics): surjective

Derived terms

• (mathematics): one-to-one and onto

See also

• (mathematics): one-to-one, injective, bijective

Translations

surjective — see surjective

Anagrams

• noot, toon, Toon