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[https://en.wikipedia.org/wiki/Atiyah%E2%80%93Singer_index_theorem Atiyah-Singer index theorem] | [https://en.wikipedia.org/wiki/Atiyah%E2%80%93Singer_index_theorem Atiyah-Singer index theorem] | ||
=== What | === What are $$R$$ and $$\bar{R}$$ geometrically? === | ||
[https://en.wikipedia.org/wiki/Einstein_field_equations Einstein field equaitions] | [https://en.wikipedia.org/wiki/Einstein_field_equations Einstein field equaitions] | ||
Einstein’s original publication, Die Feldgleichungen der Gravitation, in English | Einstein’s original publication, Die Feldgleichungen der Gravitation, in English |