Last Updated：2025/11/19
(mathematics) A function that takes a function as its argument; More precisely: A function y=f(x) whose argument x varies in a space of (real or complex valued) functions and whose value belongs to a monodimensional space. An example is the definite integration of integrable real functions in a real interval.
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functional
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Source Word
functional
IPA(Pronunciation)
Noun
(mathematics)
A
function
that
takes
a
function
as
its
argument;
More
precisely:
A
function
y=f(x)
whose
argument
x
varies
in
a
space
of
(real
or
complex
valued)
functions
and
whose
value
belongs
to
a
monodimensional
space.
An
example
is
the
definite
integration
of
integrable
real
functions
in
a
real
interval.
Japanese Meaning
数学において、関数を引数として受け取る関数、すなわち引数（実数または複素数値関数の空間内の関数）が変動し、値が一元空間に属する関数 y=f(x) を指す。例えば、可積分関数の定積分がその例である。
Sense（1）
(mathematics)
A
function
that
takes
a
function
as
its
argument;
More
precisely:
A
function
y=f(x)
whose
argument
x
varies
in
a
space
of
(real
or
complex
valued)
functions
and
whose
value
belongs
to
a
monodimensional
space.
An
example
is
the
definite
integration
of
integrable
real
functions
in
a
real
interval.
Sense（2）
Sense（3）
（ plural ）
