A Relation Between Gravity in (3+1)--Dimensions and Pontrjagin Topological Invariant
classification
✦ hep-th
keywords
gravityrelationdimensionsinvariantpontrjagindiscusseddynamicalespecial
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A relation between the MacDowell-Mansouri theory of gravity and the Pontrjagin toplogical invariant in $(3+1)$ dimensions is discussed. This relation may be of especial interest in the quest of finding a mechanism to go from non-dynamical to dynamical gravity.
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