/usr/include/trilinos/OptiPack_UnconstrainedOptMeritFunc1D.hpp is in libtrilinos-optipack-dev 12.10.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | #include "OptiPack_UnconstrainedOptMeritFunc1D_decl.hpp"
|