تابعی (ریاضیات)

${\displaystyle f\mapsto I[f]=\int _{\Omega }H(f(x),f'(x),\ldots )\;\mu ({\mbox{d}}x)}$

${\displaystyle f\mapsto \int _{x_{0}}^{x_{1}}f(x)\;\mathrm {d} x}$

${\displaystyle f\mapsto \left(\int |f|^{p}\;\mathrm {d} x\right)^{1/p}}$

${\displaystyle f\mapsto \int _{x_{0}}^{x_{1}}{\sqrt {1+|f'(x)|^{2}}}\;\mathrm {d} x}$

• "Functional", Encyclopedia of Mathematics, EMS Press, 2001 [1994]
• Rowland, Todd. "Functional". MathWorld.