Vanishing of top-degree Pontryagin class products obstructs purely electric or magnetic Weyl curvature on compact 4k-manifolds.
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New mass invariants for positive cosmological constant initial data characterize de Sitter spacetime and yield positive mass and Penrose inequalities.
citing papers explorer
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A Pontryagin class obstruction for purely electric and purely magnetic Weyl curvature tensors
Vanishing of top-degree Pontryagin class products obstructs purely electric or magnetic Weyl curvature on compact 4k-manifolds.
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Mass-type invariants in the presence of a cosmological constant
New mass invariants for positive cosmological constant initial data characterize de Sitter spacetime and yield positive mass and Penrose inequalities.