1Blurb:: 2X-convergence tolerance 3Description:: 4\c x_conv_tol maps to the internal NL2SOL control \c xctol. 5It is the X-convergence tolerance (scaled relative 6accuracy of the solution variables). 7 8The internal default is a function of machine epsilon 9(as limited by \c function_precision). The default is selected with a value of -1. 10 11Topics:: 12Examples:: 13Theory:: 14Faq:: 15See_Also:: 16