/usr/share/doc/libroot-math-physics5.34/changelog.Debian.gz is in libroot-math-physics5.34 5.34.14-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libroot-math-physics5.34/../libroot-core5.34/changelog.Debian.gz