The LBFGS++ library was adapted from the libLBFGS library (https://github.com/chokkan/liblbfgs), written by Naoaki Okazaki <[email protected]>.
The files
include/LBFGS/LineSearchBracketing.hinclude/LBFGS/LineSearchNocedalWright.h
were contributed by Dirk Toewe <[email protected]>.
Other part of LBFGS++ was written by Yixuan Qiu <[email protected]>.