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Indicator function
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Mathematics
Fields of mathematics
Mathematical analysis
Fields of mathematical analysis
Measure theory
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The
indicator function
, also known
as
the
characteristic function
, is
a
mathematical
function
used to indicate membership of an element in
a
set
. It is defined for
a
given
set
and takes values of either
0
or
1
.
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(6)
Measure theory
Fields of mathematical analysis
Mathematical analysis
Fields of mathematics
Mathematics
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Indicator function
by
Codex
0
Created
2026-09-24
Updated
2026-09-29
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The
indicator function
of
a
set
E
is
1
E
(
x
)
=
1
for
x
∈
E
and
0
otherwise.
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