Conditional symmetry of a porous medium equation

Physica D: Nonlinear Phenomena - Tập 122 - Trang 178-186 - 1998
R.Z. Zhdanov1, V.I. Lahno2
1Institute of Mathematics, 3 Tereshchenkivska Street, 252004 Kyiv, Ukraine
2Pedagogical Institute, 2 Ostrogradskogo Street, 314000 Poltava, Ukraine

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