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DFNLP solves constrained nonlinear least squares, L1- and min-max problems, where the objective function may be any of the following form:

  • sum of squares of function values
  • sum of absolute function values
  • maximum of absolute function values
  • maximum of functions
In addition there may be any set of equality or inequality constraints. It is assumed that all individual problem functions are continuously differentiable.

Current Version:   1.2

License Type:   Free for students if used only for diploma thesis or dissertation, moderate fee for University institutions, and license contract for industry.

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Source Code Availability:

Yes, (contact author Prof. K. Schittkowski)

Available Binary Packages:

  • Debian Package: No
  • RedHat RPM Package: No
  • Other Packages: No

Targeted Platforms:


Software/Hardware Requirements:

Fortran Compiler

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