different between codomain vs differentiable

English

Etymology

co- +? domain

Pronunciation

• (US) IPA^(key): /?ko?.do??me?n/

Noun

codomain (plural codomains)

1. (mathematics, mathematical analysis) The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X ? Y.
   • 1994, Richard A. Holmgren, A First Course in Discrete Dynamical Systems, Springer, page 11,

     Definition 2.5. A function is onto if each element of the codomain has at least one element of the domain assigned to it. In other words, a function is onto if the range equals the codomain.

   • 2006, Robert L. Causey, Logic, Sets, and Recursion, 2nd Edition, Jones & Bartlett Learning, page 192,

     Once we have described ${\displaystyle f}$ as a function from ${\displaystyle A}$ to ${\displaystyle B}$, by convention we will call ${\displaystyle B}$ the codomain, even though other sets, of which ${\displaystyle B}$ is a subset, could have been used. […] If ${\displaystyle y}$ is an element of the codomain, then ${\displaystyle y\in {\mathit {Img}}(f,A)}$ iff there is some ${\displaystyle x}$ in the domain such that ${\displaystyle f}$ maps ${\displaystyle x}$ to ${\displaystyle y}$.

   • 2017, Alan Garfinkel, Jane Shevtsov, Yina Guo, Modeling Life: The Mathematics of Biological Systems, Springer, page 12,

     For example, the codomain of ${\displaystyle g(X)=X^{3}}$ consists of all real numbers. A function links each element in its domain to some element in its codomain. Each domain element is linked to exactly one codomain element.

Usage notes

The codomain always contains the image of the function (the actual set of points to which points of the domain are mapped), and can be larger if the function is not surjective.

The term range is often synonymous with codomain, but can also be used as a synonym for image.

Synonyms

• (target set of a function): range

Antonyms

• (target set of a function): domain

Translations

Further reading

• Domain of a function on Wikipedia.Wikipedia
• Image (mathematics) on Wikipedia.Wikipedia
• Range (mathematics) on Wikipedia.Wikipedia
• Injective function on Wikipedia.Wikipedia
• Surjective function on Wikipedia.Wikipedia
• Bijection on Wikipedia.Wikipedia
• Codomain on Wolfram MathWorld

Anagrams

• monoacid

English

Etymology

From differentiate +? -able

Pronunciation

• (UK) IPA^(key): /?d?f.?(?)??n.??.b?l/

Adjective

differentiable (comparative more differentiable, superlative most differentiable)

1. (calculus, not comparable) Having a derivative, said of a function whose domain and codomain are manifolds.
2. (comparable, of multiple items) able to be differentiated, e.g. because they appear different

Related terms

• differentiability

Translations

Danish

Adjective

differentiable

1. plural and definite singular attributive of differentiabel