Journal
CLASSICAL AND QUANTUM GRAVITY
Volume 36, Issue 22, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6382/ab497a
Keywords
modified gravity; bimetric relativity; ghost-free bimetric theory
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The two lapse functions in the Hassan?Rosen bimetric theory are not independent. Without knowing the relation between them, one cannot evolve the equations in the 3+1 formalism. This work computes the ratio of lapses for the spherically symmetric case, which is a prerequisite for numerical bimetric relativity.
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