25 citations · 119 across the 42 of their papers we have counts for
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math.DG2022★ 3 cited
On natural invariants and equivalence of differential operators
Valentin Lychagin, Valeriy Yumaguzhin
We give a description of the field of rational natural differential invariants for a class of nonlinear differential operators of order on a smooth manifold of dimension $…
math-ph2022★ 4 cited
Natural differential invariants and equivalence of third order nonlinear differential operators
Valentin Lychagin, Valeriy Yumaguzhin
We give a description of the field of rational natural differential invariants for a class of nonlinear differential operators of the third order on a two dimensional manifold and…