absolute_conv_tol
Absolute convergence tolerance
Specification
Alias: None
Arguments: REAL
Default: -1. (use NL2SOL internal default)
Description
absolute_conv_tol (NL2SOL’s
afctol) is the absolute function convergence tolerance (stop when half
the sum of squares is less than absolute_conv_tol, which is mainly
of interest on zero-residual test problems).
The internal default is a function of machine epsilon
(as limited by function_precision). The default is selected with a value of -1.
