Kinematical Covariance and Dynamical
نویسندگان
چکیده
We consider a net of algebras, kinematically covariant under general diieomor-phisms. A physical state induces dynamical relations, encoded by an associated net of ideals, annihilated by this state. Hence the related net of observables is in general not covariant under the full kinematical group of diieomorphisms, but only under its subgroup of dynamical symmetries. We comment on the implications of this structure, and on the possibility to introduce algebraically a natural partial order, which is related to the notions of both, a causal structure and time.
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