identity function

Meanings

nounidentity function (plural identity functions)

mathematicsA function whose value is always the same as its independent variable, and for which the codomain equals the domain.

Also see

Catalan funció identitat

funció identitata function whose value is always the same as its independent variable

Chinese Mandarin 恆等式 /恒等式

恆等式 /恒等式 (héngděngshì)a function whose value is always the same as its independent variable

Finnish identiteettifunktio

identiteettifunktioa function whose value is always the same as its independent variable

French application identité, fonction identité

application identitéa function whose value is always the same as its independent variable
fonction identitéa function whose value is always the same as its independent variable

Hebrew פונקצית זהות

פונקצית זהותa function whose value is always the same as its independent variable

Hungarian identitásfüggvény

identitásfüggvénya function whose value is always the same as its independent variable

Russian тожде́ственное отображе́ние

тожде́ственное отображе́ние (toždéstvennoje otobražénije)a function whose value is always the same as its independent variable

Spanish función identidad

función identidada function whose value is always the same as its independent variable

Vietnamese đồng nhất thức

đồng nhất thứca function whose value is always the same as its independent variable

Cite this entry

APA

identity function. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/identity%20function

MLA

“identity function.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/identity%20function. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “identity function,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/identity%20function.