This directory contains the original Fortran 77 code of Powell's derivative-free optimization
solvers, namely COBYLA, UOBYQA, NEWUOA, BOBYQA, and LINCOA.

The code of COBYLA, NEWUOA, BOBYQA, and LINCOA was sent by the late Professor M. J. D. Powell FRS
to Zaikun Zhang in December 2013, while that of UOBYQA was sent on April 6th, 2015.

This version is not maintained anymore. Please use the modernized version instead.