Fortran - Force 20
While there is no single established literary "story" titled Fortran Force 20
: Users have reported cases where Force 2.0 fails to flag certain compilation errors (like bad data declarations), leading to incorrect program results without warning. Compatibility fortran force 20
A new method for structural optimization is presented. The method is based on a concept of'moving asymptotes'. The subproblems are strictly convex and separable, and they can be solved efficiently by a dual method. The algorithm is globally convergent for smooth problems. The method seems to be especially efficient for large-scale problems, where the number of design variables is large but the number of active constraints is relatively small. The method is simple to implement and it requires only the function values and the first derivatives of the objective and constraint functions. While there is no single established literary "story"
iterative loop (labeled 20)
Therefore, "Fortran Force 20" is a colloquial or mnemonic reference to the used to force convergence of the dual variables in the MMA optimization algorithm. The subproblems are strictly convex and separable, and
program force_precision ! Use intrinsic selected_real_kind to force precision integer, parameter :: dp = selected_real_kind(15, 307) real(kind=dp) :: pi

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