This file is indexed.

/usr/lib/R/site-library/polyCub/INDEX is in r-cran-polycub 0.6.1-3ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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checkintrfr             Check the Integral of r f_r(r)
circleCub.Gauss         Integration of the Isotropic Gaussian Density
                        over Circular Domains
coerce-gpc-methods      Conversion between polygonal '"owin"' and
                        '"gpc.poly"'
coerce-sp-methods       Coerce '"SpatialPolygons"' to '"owin"'
gpclibPermit            'gpclib' Licence Acceptance
plot_polyregion         Plots a Polygonal Domain (of Various Classes)
plotpolyf               Plot Polygonal Domain on Image of Bivariate
                        Function
polyCub                 Wrapper Function for the Various Cubature
                        Methods
polyCub-package         Cubature over Polygonal Domains
polyCub.SV              Product Gauss Cubature over Polygonal Domains
polyCub.exact.Gauss     Quasi-Exact Cubature of the Bivariate Normal
                        Density
polyCub.iso             Cubature of Isotropic Functions over Polygonal
                        Domains
polyCub.midpoint        Two-Dimensional Midpoint Rule
xylist                  Convert Various Polygon Classes to a Simple
                        List of Vertices