4 citations · 4 across the 1 of their papers we have counts for
2 papers
math-ph2003★ 4 cited
Differential Invariants and Construction of Conditionally Invariant Equations
Irina Yehorchenko
New concept of conditional differential invariant is discussed that would allow description of equations invariant with respect to an operator under a certain condition. Example of…
math-ph2001
Group Classification of Generalised Eikonal Equations
Roman O. Popovych, Irina A. Yehorchenko
A new approach to the problem of group classification is applied to the class of first-order non-linear equations of the form . It allowed complete solution of…