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! ITTIKB integrates (I0(t)-1)/t from 0 to x, K0(t)/t from x to infinity.
Licensing:
This routine is copyrighted by Shanjie Zhang and Jianming Jin. However,
they give permission to incorporate this routine into a user program
provided that the copyright is acknowledged.
Modified:
28 July 2012
Author:
Shanjie Zhang, Jianming Jin
Reference:
Shanjie Zhang, Jianming Jin,
Computation of Special Functions,
Wiley, 1996,
ISBN: 0-471-11963-6,
LC: QA351.C45.
Parameters:
Input, real ( kind = 8 ) X, the integral limit.
Output, real ( kind = 8 ) TTI, TTK, the integrals of
[I0(t)-1]/t from 0 to x, and K0(t)/t from x to oo.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=8) | :: | x | ||||
| real(kind=8) | :: | tti | ||||
| real(kind=8) | :: | ttk |