Vasyl’FedorchukDepartment of Algebra, 
Volodymyr FedorchukDepartment of Algebra, 



April 28, 2021 at 16:00 onlineJoin Zoom Meeting 
Abstract of talk
The classification of symmetry reductions for the Monge – Ampère equation in the space M(1,3) x R(u) is carried out. Some results obtained by using the classification of threedimensional nonconjugate subalgebras of the Lie algebra of the Poincaré group P(1,4) are presented.
Here: M(1,3) is the (1+3) – dimensional Minkowski space; R(u) is the real number axis of the dependent variable u.