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+Minpack includes software for solving nonlinear equations and
+nonlinear least squares problems. Five algorithmic paths each include
+a core subroutine and an easy-to-use driver. The algorithms proceed
+either from an analytic specification of the Jacobian matrix or
+directly from the problem functions. The paths include facilities for
+systems of equations with a banded Jacobian matrix, for least squares
+problems with a large amount of data, and for checking the consistency
+of the Jacobian matrix with the functions.