\relax \@writefile{toc}{\contentsline {subsection}{\numberline {8.1}Covariant Differentiation}{54}} \@writefile{toc}{\contentsline {subsection}{\numberline {8.2}The Curvature Tensor}{56}} \@writefile{toc}{\contentsline {subsection}{\numberline {8.3}Physical significance of curvature}{57}} \@writefile{toc}{\contentsline {subsection}{\numberline {8.4}Mathematical measure of curvature}{58}} \@writefile{toc}{\contentsline {subsection}{\numberline {8.5}Properties of the curvature tensor}{59}}