| C05NBF | Solution of system of nonlinear equations using function values only (easy-to-use) |
| C05NCF | Solution of system of nonlinear equations using function values only (comprehensive) |
| C05NDF | Solution of system of nonlinear equations using function values only (reverse communication) |
| C05PBF | Solution of system of nonlinear equations using first derivatives (easy-to-use) |
| C05PCF | Solution of system of nonlinear equations using first derivatives (comprehensive) |
| C05PDF | Solution of system of nonlinear equations using first derivatives (reverse communication) |
| D02GAF | ODEs, boundary value problem, finite difference technique with deferred correction, simple nonlinear problem |
| D02RAF | ODEs, general nonlinear boundary value problem, finite difference technique with deferred correction, continuation facility |
| D02TKF | ODEs, general nonlinear boundary value problem, collocation technique |
| D02TVF | ODEs, general nonlinear boundary value problem, setup for D02TKF |
| D02TXF | ODEs, general nonlinear boundary value problem, continuation facility for D02TKF |
| D02TYF | ODEs, general nonlinear boundary value problem, interpolation for D02TKF |
| D02TZF | ODEs, general nonlinear boundary value problem, diagnostics for D02TKF |
| D05BAF | Nonlinear Volterra convolution equation, second kind |
| D05BDF | Nonlinear convolution Volterra–Abel equation, second kind, weakly singular |
| D05BEF | Nonlinear convolution Volterra–Abel equation, first kind, weakly singular |
| E04UFF | Minimum, function of several variables, sequential QP method, nonlinear constraints, using function values and optionally first derivatives (reverse communication, comprehensive) |
| E04USF | Minimum of a sum of squares, nonlinear constraints, sequential QP method, using function values and optionally first derivatives (comprehensive) |
| E04WDF | Solves the nonlinear programming (NP) problem |
| E04YCF | Covariance matrix for nonlinear least-squares problem (unconstrained) |