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Bessel I1E Function
Math Engineering Class

Public Function BesselI1E( _
    ByVal vX As Variant _
    ) As Variant

Compute the exponentially scaled modified (hyperbolic) Bessel function of the first kind of order one.

Examples: 
    BesselI1E(-.5) = -0.156420803184872
    BesselI1E(0.0) = 0
    BesselI1E(0.5) = 0.156420803184872
    BesselI1E(5.0) = 0.163972266944542
    BesselI1E(5.0) = BesselIE(5.0, 1)
See also: 
    BesselI1 Function
    BesselI0E Function
    BesselIE Function
    BesselI Function
    BesselK1E Function
    DBSI1E Function
vX: Function returns Null if vX is Null or cannot be fixed up to a Double precision floating point number.

BesselI1E(X) calculates the double precision exponentially scaled modified (hyperbolic) Bessel function of the first kind of order one for double precision argument X. The result is I1(X) multiplied by EXP(-ABS(X)).

Copyright 1996-1999 Entisoft
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