BesselK(v, z)
v
Real number.

z
Real or complex number.

Description
Returns the Modified Bessel function of the second kind.

Examples
BesselK(0, 0)
BesselK(0, 2)
0.1138938727495336
BesselK(2.3, 1.5)
0.2521408213474743
π
BesselK(3/2, x)
2
π
x
e
-
x
2
x
+
2
π
x
e
-
x
2
BesselK(3/2, -z)
-
-
2
π
z
e
z
2
z
+
-
2
π
z
e
z
2
BesselK(1, 2+3#i)
-0.0864999764812817
+
0.0390614340052147
i
Plot([BesselK(0, x), BesselK(1, x), BesselK(2, x), BesselK(3, x)], x=[-1, 5])
-20246210-1-2

References

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