Lviv National University,
Universytetska Street 1, Lviv, 79000, Ukraine
E-mail: fedorchukv@ukr.net
 

On Differential Equations of First- and Second Order in the Space M(1,3) x R(u) with Nontrivial Symmetry Groups
 

Abstract:
The differential equations of the first order in the space M(1,3) x R(u) which are invariant under splitting subgroups of the group
P(1,4) have been constructed. For majority of these subgroups the differential equations of the second order in the same space have also been described.