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Complex arguments in Bessel functions [message #41526]

Mon, 01 November 2004 03:45

Ben Carter
Messages: 1
Registered: November 2004

Junior Member

I am attempting to solve an equation in IDL which involves Modified
Bessel Functions (using a simple root finding algorithm(newtons
method)). The roots to the equation however are complex and IDL's
'beselK(argument, order)' function ignores imaginary numbers when
entered so for example gives: beselK(1,0) = beselK(1+i,0) and
beselk(i,0) gives an error since K(x,0) -> inf. as x ->inf.
Q: Does anyone know if there is an easy way round this....or, in fact,
any way round it at all?
Thanks,
Ben Carter

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Complex arguments in Bessel functions

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