claim: Ed and Lorraine Warren believed Roman Catholicism.
evidence: In general relativity and tensor calculus , the Palatini identity is  :. general relativity. general relativity. tensor calculus. tensor calculus. Palatini. Attilio Palatini. where denotes the variation of Christoffel symbols and semicolon '' ; '' indicates covariant differentiation .. Christoffel symbols. Christoffel symbols. covariant differentiation. covariant differentiation. Proof can be found in the entry Einstein -- Hilbert action .