Lines Matching refs:SNSQ

2       SUBROUTINE SNSQ(FCN,JAC,IOPT,N,X,FVEC,FJAC,LDFJAC,XTOL,MAXFEV,
5 C***BEGIN PROLOGUE  SNSQ
11 C***PURPOSE  SNSQ finds to find a zero of a system of N nonlinear
18 C       The purpose of SNSQ is to find a zero of a system of N non-
30 C       SUBROUTINE SNSQ(FCN,JAC,IOPT,N,X,FVEC,FJAC,LDFJAC,XTOL,MAXFEV,
43 C       entry to SNSQ and are not changed on exit, while parameters
45 C       and are set to appropriate values on exit from SNSQ.
62 C         user wants to terminate execution of SNSQ.  In this case, set
82 C         user wants to terminate execution of SNSQ.  In this case, set
207 C       The accuracy of SNSQ is controlled by the convergence parameter
209 C       between the approximation X and a solution XSOL.  SNSQ termi-
212 C       R1MACH(4)), then SNSQ only attempts to satisfy the test
219 C       are not satisfied, then SNSQ may incorrectly indicate conver-
223 C       rerunning SNSQ with a tighter tolerance.
236 C         of convergence of SNSQ usually avoids this possibility.
243 C       Unsuccessful termination of SNSQ can be due to improper input
254 C         be caused by an unacceptable choice of X by SNSQ.  In this
256 C         SNSQ with a smaller value of FACTOR.
264 C         of good progress is usually diagnosed earlier by SNSQ,
267 C       Lack of Good Progress.  SNSQ searches for a zero of the system
273 C         zero.  If the system has a zero, rerunning SNSQ from a dif-
279 C       SNSQ is a modification of the Powell hybrid method.  Two of its
291 C       Timing.  The time required by SNSQ to solve a given problem
294 C         operations needed by SNSQ is about 11.5*(N**2) to process
298 C         the timing of SNSQ will be strongly influenced by the time
301 C       Storage.  SNSQ requires (3*N**2 + 17*N)/2 single precision
318 C C     Driver for SNSQ example.
358 C       CALL SNSQ(FCN,JAC,IOPT,N,X,FVEC,FJAC,LDFJAC,XTOL,MAXFEV,ML,MU,
413 C***END PROLOGUE  SNSQ