Extensions to AMPL

• Enhanced nonlinear solver support

• Shared libraries (DLLs) for user-defined functions

Finding updates and bug fixes   -- Browse the complete AMPL change logs.

Updating AMPL Professional Edition software

Downloading AMPL Student Edition (book) software

AMPL's modeling language and environment have continued to evolve in response to users' needs. Thus many significant features have been added since the first edition of the AMPL book.

Draft writeups of the new features are organized as follows. See also our new language features page for a more detailed table of contents. All of these features are fully covered in the second edition of the AMPL book.

• Changing the Model and Data

• Character Strings
  (with rules for regular expressions and printf format strings)

• Complementarity problems
  (with examples)

• Database access
  (with examples and shared library loading conventions)

• Examining Models and Data

• Looping and Testing 1:
  Writing "scripts" in the AMPL command language (with examples)

• Looping and Testing 2:
  Implementing algorithms through AMPL scripts (with examples)

• Presolve Tolerances

• Reporting and Display

• Statuses

• Suffixes
  (with table of built-in suffixes)