incompleteGammaP
incompleteGammaP (
a
,
x
)
incompleteGammaP = 1/Γ(
a
)∫
0
x
e
-
t
t
a
-1
dt,
where
x
and
a
are real numbers that satisfy
x
≥ 0 and
a
not being a negative integer.
© djmw 20170531