scientific article
zbMath0474.35007MaRDI QIDQ3930082
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Publication date: 1981
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
symmetry propertiesProca equationnon-Lie methodelectromagnetic field 4-vector potential equationintegro-differential (non-local) operatorsPoincare-invariant second-order equations
Pseudodifferential operators as generalizations of partial differential operators (35S05) Infinite-dimensional groups and algebras motivated by physics, including Virasoro, Kac-Moody, (W)-algebras and other current algebras and their representations (81R10) Geometric theory, characteristics, transformations in context of PDEs (35A30) Lie groups (22E99)
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