8 citations · 29 across the 9 of their papers we have counts for
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gr-qc2016★ 3 cited
Principal Symbol of Euler-Lagrange Operators
Lorenzo Fatibene, Simon Garruto
We shall introduce the principal symbol for Euler-Lagrange operators and use them to charac- terise well-posed initial value problems. We shall clarify how constraints can arise in…
gr-qc2016★ 1 cited
Extended Theories of Gravitation
Lorenzo Fatibene, Simon Garruto
In this paper we shall review the equivalence between Palatini theories and Brans- Dicke (BD) theories at the level of action principles. We shall define the Helmho…