P2 t)x.2 is the density of (16) if each r' is odd. As we see. using theorems 12,3 we simply derive results for linear equations, blit real power of these theorems could be demonstrated on nonlinear equations, but, it is out of scope of this paper. REFER N E s l. R.Skhirtladze, 011 Polynomial Conservation Laws For Some Evolution Equations, Seminar of l. Vekua Institute. of Applied Mathematics ...

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