struve_l1returns the value of the modified Struve function of order , .
For full information please refer to the NAG Library document for s18gb
The argument of the function.
The value of the function at .
- (errno )
The value of is larger than the largest positive floating-point number, which is returned.
struve_l1evaluates an approximation to the modified Struve function of order , .
Please consult the NIST Digital Library of Mathematical Functions for a detailed discussion of the Struve function including special cases, transformations, relations and asymptotic approximations.
The approximation method used by this function is based on Chebyshev expansions.
NIST Digital Library of Mathematical Functions
MacLeod, A J, 1996, MISCFUN, a software package to compute uncommon special functions, ACM Trans. Math. Software (TOMS) (22(3)), 288–301