GNU Scientific Library Reference Manual - Third Edition (v1.12) by M. Galassi, J. Davies, J. Theiler, B. Gough, G. Jungman, P. Alken, M. Booth, F. Rossi Paperback (6"x9"), 592 pages, 60 figures ISBN 0954612078 RRP £24.95 ($39.95) Get a printed copy>>>

GNU Scientific Library Reference Manual - Third Edition (v1.12) Buy the book here >>> $39.95

7.17.5 Trigonometric Integrals

Function: double gsl_sf_Si (const double x)

Function: int gsl_sf_Si_e (double x, gsl_sf_result * result)

These routines compute the Sine integral Si(x) = \int_0^x dt \sin(t)/t.

Function: double gsl_sf_Ci (const double x)

Function: int gsl_sf_Ci_e (double x, gsl_sf_result * result)

These routines compute the Cosine integral Ci(x) = -\int_x^\infty dt \cos(t)/t for x > 0.