116 citations · 762 across the 46 of their papers we have counts for
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Classification of five-point differential-difference equations II
R. N. Garifullin, R. I. Yamilov, D. Levi
Using the generalized symmetry method we finish a classification, started in the article [R.N. Garifullin, R.I. Yamilov and D. Levi, Classification of five-point differential-diffe…
Differential equations invariant under conditional symmetries
Decio Levi, Miguel Angel Rodriguez, Zora Thomova
Nonlinear PDE's having {\bf given} conditional symmetries are constructed. They are obtained starting from the invariants of the "conditional symmetry" generator and imposing the e…
Conformally invariant elliptic Liouville equation and its symmetry preserving discretization
Decio Levi, Luigi Martina, Pavel Winternitz
The symmetry algebra of the real elliptic Liouville equation is an infinite-dimensional loop algebra with the simple Lie algebra as its maximal finite-dimensional subalgeb…