| C05AUF | Zero of continuous function, Brent algorithm, from a given starting value, binary search for interval |
| C05AVF | Binary search for interval containing zero of continuous function (reverse communication) |
| C05AWF | Zero of continuous function, continuation method, from a given starting value |
| C05AXF | Zero of continuous function, continuation method, from a given starting value (reverse communication) |
| C05AYF | Zero of continuous function in a given interval, Brent algorithm |
| C05AZF | Zero of continuous function in a given interval, Brent algorithm (reverse communication) |
| C05BAF | Real values of Lambert's W function, W(x) |
| C05BBF | Values of Lambert's W function, W(z) |
| C05QBF | Solution of a system of nonlinear equations using function values only (easy-to-use) |
| C05QCF | Solution of a system of nonlinear equations using function values only (comprehensive) |
| C05QDF | Solution of a system of nonlinear equations using function values only (reverse communication) |
| C05QSF | Solution of a sparse system of nonlinear equations using function values only (easy-to-use) |
| C05RBF | Solution of a system of nonlinear equations using first derivatives (easy-to-use) |
| C05RCF | Solution of a system of nonlinear equations using first derivatives (comprehensive) |
| C05RDF | Solution of a system of nonlinear equations using first derivatives (reverse communication) |
| C05ZDF | Check user's routine for calculating first derivatives of a set of nonlinear functions of several variables |