Unimodular gravity with signature reversal symmetry in a D=2(2n+1)-dimensional bulk resolves the second cosmological constant problem by determining its specific small value.
Carballo-Rubio, L
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Resolution of the cosmological constant problem by unimodular gravity and signature reversal symmetry
Unimodular gravity with signature reversal symmetry in a D=2(2n+1)-dimensional bulk resolves the second cosmological constant problem by determining its specific small value.