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SpecialFuncs.Besj Function
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Bessel function of the first kind Jn(Z) (Complex argument, can be scaled).

Pascal
function Besj(NU: double; Z: TCplx; Scale: boolean): TCplx; overload;
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Parameters
Parameters 
Description 
NU 
Defines the order of the Bessel function of the first kind Jn. 
Z 
Defines complex value for which Jn(Z) should be evaluated. 
Scale 
If Scale parameter is true, Jn(Z) is multiplied by exp(-|Im(Z)|). 
Returns

the Bessel function of the first kind Jn(Z) with NU parameter describing order of Bessel function. If Scale parameter is true, Jn(Z) is multiplied by exp(-|Im(Z)|)

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