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Unformatted text preview: are closed, that is, d ( l ) = d = . 2. Find the expressions in local coordinates for these forms. These forms dene so called characteristic classes , which are closed in-variant forms whose integrals over the manifold do not depend on the metric and, therefore, are topological invariants of the manifold. di geom.tex; April 12, 2006; 17:59; p. 160 162 CHAPTER 6. CONNECTION AND CURVATURE di geom.tex; April 12, 2006; 17:59; p. 161...
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