### Functional (mathematics) - Wikipedia

In mathematics, a functional (as a noun) is a certain type of function. The exact definition of the term varies depending on the subfield (and sometimes even the author). In linear algebra , it is synonymous with linear forms , which are linear mapping from a vector space V {\displaystyle V} into its field of scalars (that is, an element of the dual space V ∗ {\displaystyle V^{*}} ) [1]

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