109 citations · 291 across the 9 of their papers we have counts for
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math-ph2002★ 8 cited
Equivalence of Q-Conditional Symmetries under Group of Local Transformation
Roman O. Popovych
The definition of Q-conditional symmetry for one PDE is correctly generalized to a special case of systems of PDEs and involutive families of operators. The notion of equivalence o…
math-ph2002★ 7 cited
On Reduction and Q-conditional (Nonclassical) Symmetry
Roman O. Popovych
Some aspects of -conditional symmetry and of its connections with reduction and compatibility are discussed.