6 citations · 6 across the 1 of their papers we have counts for
2 papers
math.CA2021★ 6 cited
Admissible transformations and Lie symmetries of linear systems of second-order ordinary differential equations
Vyacheslav M. Boyko, Oleksandra V. Lokaziuk, Roman O. Popovych
We revisit the results on admissible transformations between normal linear systems of second-order ordinary differential equations with an arbitrary number of dependent variables u…
math-ph2020
Realizations of Lie algebras on the line and the new group classification of (1+1)-dimensional generalized nonlinear Klein-Gordon equations
Vyacheslav M. Boyko, Oleksandra V. Lokaziuk, Roman O. Popovych
Essentially generalizing Lie's results, we prove that the contact equivalence groupoid of a class of (1+1)-dimensional generalized nonlinear Klein-Gordon equations is the first-ord…