ZQCBK(3)

SYNOPSIS
SUBROUTINE ZQCBK (LUN, KPRINT, IPASS)

NAME
zqcbk - Quick check for SLATEC subroutine ZBESK

LIBRARY
SLATEC

CATEGORY
C10B4

TYPE
COMPLEX (CQCBK-C, ZQCBK-Z)

KEYWORDS
QUICK CHECK, ZBESK

AUTHOR
Amos, Don, (SNL) Goudy, Sue, (SNL) Walton, Lee, (SNL)

DESCRIPTION
*Usage: INTEGER LUN, KPRINT, IPASS CALL ZQCBK (LUN, KPRINT, IPASS) *Arguments: LUN :IN is the unit number to which output is to be written. KPRINT :IN controls the amount of output, as specified in the SLATEC Guidelines. IPASS :OUT indicates whether the test passed or failed. A value of one is good, indicating no failures. *Description: *** A DOUBLE PRECISION ROUTINE *** ZQCBK is a quick check routine for the complex K Bessel function generated by subroutine ZBESK. ZQCBK generates sequences of I and K Bessel functions from ZBESI and ZBESK and checks them against the Wronskian evaluation in the (Z,FNU) space.

REFERENCES
Abramowitz, M. and Stegun, I. A., Handbook of Mathematical Functions, Dover Publications, New York, 1964. Amos, D. E., A Subroutine Package for Bessel Functions of a Complex Argument and Nonnegative Order, SAND85-1018, May, 1985.

ROUTINES CALLED
ZBESI, ZBESK, ZABS, ZDIV, ZEXP, I1MACH, D1MACH

REVISION HISTORY (YYMMDD)
830501 DATE WRITTEN
890831 Revised to meet new SLATEC standard
930122 Added ZEXP to EXTERNAL Statement. (RWC)