deletions | additions       diff --git a/In_spherical_polar_c.tex b/In_spherical_polar_c.tex  deleted file mode 100644  index fff1b99..0000000  --- a/In_spherical_polar_c.tex  +++ /dev/null 
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In spherical polar coordinates, the four-metric is:  diff --git a/layout.md b/layout.md  index fb9b6ed..3d7ded3 100644  --- a/layout.md  +++ b/layout.md 
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sectionFlat_Space.tex  This_is_the_default.tex  subsectionMinkowski_.tex  In_spherical_polar_c.tex  brace_ds2__dt2.tex  In_Cartesian_coordin.tex  brace_ds2__.tex