/usr/lib/R/site-library/quadprog/INDEX is in r-cran-quadprog 1.5-5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | solve.QP Solve a Quadratic Programming Problem
solve.QP.compact Solve a Quadratic Programming Problem
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