A variational analysis of Einstein-scalar field Lichnerowicz equations on compact Riemannian manifolds. (English) Zbl 1218.53042
Summary: We establish new existence and non-existence results for positive solutions of the Einstein-scalar field Lichnerowicz equation on compact manifolds. This equation arises from the Hamiltonian constraint equation for the Einstein-scalar field system in general relativity. Our analysis introduces variational techniques, in the form of the mountain pass lemma, to the analysis of the Hamiltonian constraint equation, which has been previously studied by other methods.
MSC:
| 53C21 | Methods of global Riemannian geometry, including PDE methods; curvature restrictions |
| 58J60 | Relations of PDEs with special manifold structures (Riemannian, Finsler, etc.) |
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