Let 
, then the positive part of 
is the function 
defined by
 |
The positive part satisfies the identity
 |
where 
is the negative part of 
.
Positive Part
See also
Negative PartThis entry contributed by John Renze
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Cite this as:
Weisstein, Eric W., with contributions by John Renze. "Positive Part." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/PositivePart.html