onto

Definition from Wiktionary, a free dictionary

Contents 1 English 1.1 Preposition 1.2 Adjective 1.2.1 Synonyms 1.2.2 Derived terms 1.2.3 See also 1.2.4 Translations

[edit] English

[edit] 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.

[edit] 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.

[edit] Synonyms

• (mathematics) surjective

[edit] Derived terms

• (mathematics) one-to-one and onto

[edit] See also

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

[edit] Translations

• Swedish: surjektiv sv(sv)