x_conv_tol
X-convergence tolerance
Specification
Alias: None
Arguments: REAL
Default: -1. (use NL2SOL internal default)
Description
x_conv_tol
maps to the internal NL2SOL control xctol
.
It is the X-convergence tolerance (scaled relative
accuracy of the solution variables).
The internal default is a function of machine epsilon
(as limited by function_precision
). The default is selected with a value of -1.