Proves that the index of the cosmological horizon MOTS in Kerr-Newman-de Sitter is at least one for small a, exactly one under mass lower bound, at least two under upper bound, and establishes an area-charge inequality for index-one MOTS.
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The index of the cosmological horizon and the area-charge-inequality
Proves that the index of the cosmological horizon MOTS in Kerr-Newman-de Sitter is at least one for small a, exactly one under mass lower bound, at least two under upper bound, and establishes an area-charge inequality for index-one MOTS.