NLEQ1 - the basic ANT code for systems of highly nonlinear equations up to a moderate size
This code represents the basic version of the global affine invariant Newton algorithm.

Additional properties of NLEQ1 are:

• The Jacobian may be supplied by user subroutine or internally computed by means of numerical differentiation
• The Jacobian may be stored in full mode or in LINPACK band mode format, and solution of the linear systems are done with the LINPACK routines DGEFA/DGESL or DGBFA/DGBSL
• Optional indirect rank-1 (Broyden) updates are available, which only perform vector operations and, therefore, may be always used - also with banded Jacobians.

These files are available from the CodeLib: the NLEQ1 tar-archive (use "load to disk") , and

• README file
• subroutine package NLEQ1
• sample calling program for NLEQ1
• sample monitor output of the above program
• sample data output of the above program
• easy to use subroutine NLEQ1E
• sample calling program for NLEQ1E
• sample monitor output of the above program

ANT - Introduction   Codes - Introduction  NLEQ1   NLEQ1S
NLEQ2                    GIANT                        References