Fortran zeros of bessel function1/30/2023 ![]() A scaling option to remove the exponential decay for x > 0 is also available. Chebyshev expansions on appropriate intervals are used in functions AIRY and DAIRY for the Airy functions Ai(x) and Ai'(x), respectively. The normalization is always computed first with the leading term tested for underflow before any extensive computation is done. Fortran 2008 has besseljn(n, x) intrinsic. Number of underflows set to zero C NZ0 Normal return C NZ>0 CY(L)0 for NZ values of L, usually on C KODE2 (the underflows may not be in an. infinity, is utilized to compute sequences of Bessel functions and cover other parts of more ยป the (.nu.,x) plane where no normalization expression is available. I am trying to compute the Bessel function(s) using the SLATEC Amos library available on Netlib. ![]() are used to start the recursion for x > 20. ![]() forward recursion is stable, and values from the asymptotic expansion for x. ![]() infinity, and the uniform asymptotic expansion for. Subroutine BESJ implements the power series, the asymptotic expansion for x. ![]()
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