NLEQ1S - the sparse Jacobian ANT code for systems of larger dimensions
This code is the sparse version of NLEQ1, i.e. the Jacobian must be stored in a certain format which is suitable for sparse matrices, and a sparse linear solver is used for the solution of the arising linear systems.

Additional properties of NLEQ1S are:

• The Jacobian must be supplied by user subroutine.
• The solution of the linear systems will be done by the Y12M-package routines
  Y12MBF/Y12MCF/Y12MDF (also available from NETLIB),
• Optional indirect rank-1 (Broyden) updates are also available.

These files are available from the CodeLib: the NLEQ1S tar-archive (use "load to disk") , and

• README file
• subroutine package NLEQ1S
• sample calling program for NLEQ1S
• sample monitor output of the above program
• sample data output of the above program

A special edition of NLEQ1S, which calls the linear solver of the UMFPACK package instead of the Y12M routines, is also available (list directory, tar-file) .

ANT - Introduction   Codes - Introduction  NLEQ1   NLEQ1S
NLEQ2                    GIANT                        References