Abstract
We discuss an extension of the theory of multidimensional second-order equations of the elliptic and hyperbolic types related to multidimensional quasilinear autonomous first-order partial differential equations. Calculating the general integrals of these equations allows constructing exact solutions in the form of implicit functions. We establish a connection with hydrodynamic equations. We calculate the number of free functional parameters of the constructed solutions. We especially construct and analyze implicit solutions of the Laplace and d’Alembert equations in a coordinate space of arbitrary finite dimension. In particular, we construct generalized Penrose–Rindler solutions of the d’Alembert equation in 3+1 dimensions.
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This research was supported by the Ministry of Education and Science of the Russia Federation (State Mission and Project No. 14.Z50.31.0015).
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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 186, No. 3, pp. 371–385, March, 2016.
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Zhuravlev, V.M. Multidimensional quasilinear first-order equations and multivalued solutions of the elliptic and hyperbolic equations. Theor Math Phys 186, 320–332 (2016). https://doi.org/10.1134/S0040577916030028
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DOI: https://doi.org/10.1134/S0040577916030028