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Bessel K0 Function
Math Engineering Class

Public Function BesselK0( _
    ByVal vX As Variant _
    ) As Variant

Compute the modified (hyperbolic) Bessel function of the third kind of order zero.

Examples: 
    BesselK0(0.1) = 2.42706902470201
    BesselK0(0.5) = 0.924419071227663
    BesselK0(5.0) = 3.69109833404259E-03
    BesselK0(5.0) = BesselK(5.0, 0)
See also: 
    BesselK0E Function
    BesselK1 Function
    BesselK Function
    BesselI0 Function
    DBESK0 Function
vX: Function returns Null if vX is Null or cannot be fixed up to a Double precision floating point number.

BesselK0 calculates the double precision modified (hyperbolic) Bessel function of the third kind of order zero for double precision argument X. The argument must be greater than zero but not so large that the result underflows.

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