/usr/share/tcltk/tcllib1.17/math/ is in tcllib 1.17-dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/tcltk/tcllib1.17/math/bessel.tcl
/usr/share/tcltk/tcllib1.17/math/bigfloat.tcl
/usr/share/tcltk/tcllib1.17/math/bigfloat2.tcl
/usr/share/tcltk/tcllib1.17/math/bignum.tcl
/usr/share/tcltk/tcllib1.17/math/calculus.tcl
/usr/share/tcltk/tcllib1.17/math/classic_polyns.tcl
/usr/share/tcltk/tcllib1.17/math/combinatorics.tcl
/usr/share/tcltk/tcllib1.17/math/constants.tcl
/usr/share/tcltk/tcllib1.17/math/decimal.tcl
/usr/share/tcltk/tcllib1.17/math/elliptic.tcl
/usr/share/tcltk/tcllib1.17/math/exponential.tcl
/usr/share/tcltk/tcllib1.17/math/fourier.tcl
/usr/share/tcltk/tcllib1.17/math/fuzzy.tcl
/usr/share/tcltk/tcllib1.17/math/geometry.tcl
/usr/share/tcltk/tcllib1.17/math/interpolate.tcl
/usr/share/tcltk/tcllib1.17/math/kruskal.tcl
/usr/share/tcltk/tcllib1.17/math/linalg.tcl
/usr/share/tcltk/tcllib1.17/math/liststat.tcl
/usr/share/tcltk/tcllib1.17/math/machineparameters.tcl
/usr/share/tcltk/tcllib1.17/math/math.tcl
/usr/share/tcltk/tcllib1.17/math/misc.tcl
/usr/share/tcltk/tcllib1.17/math/mvlinreg.tcl
/usr/share/tcltk/tcllib1.17/math/numtheory.tcl
/usr/share/tcltk/tcllib1.17/math/optimize.tcl
/usr/share/tcltk/tcllib1.17/math/pdf_stat.tcl
/usr/share/tcltk/tcllib1.17/math/pkgIndex.tcl
/usr/share/tcltk/tcllib1.17/math/plotstat.tcl
/usr/share/tcltk/tcllib1.17/math/polynomials.tcl
/usr/share/tcltk/tcllib1.17/math/qcomplex.tcl
/usr/share/tcltk/tcllib1.17/math/rational_funcs.tcl
/usr/share/tcltk/tcllib1.17/math/romannumerals.tcl
/usr/share/tcltk/tcllib1.17/math/special.tcl
/usr/share/tcltk/tcllib1.17/math/stat_kernel.tcl
/usr/share/tcltk/tcllib1.17/math/statistics.tcl
/usr/share/tcltk/tcllib1.17/math/symdiff.tcl
/usr/share/tcltk/tcllib1.17/math/tclIndex
/usr/share/tcltk/tcllib1.17/math/wilcoxon.tcl