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- W2127840711 abstract "The general Miura transformation (t,x,u(t,x)) to (s,y,v(s,y)): v=a(t,x,u,. . ., delta ru/ delta xr), y=b(t,x,u,. . ., delta ru/ delta xr), s=c(t,x,u,. . ., delta ru/ delta xr) is considered which connects two evolution equations ut=f(t,x,u,. . ., delta nu/ delta xn) and vs=g(t,x,u,. . ., delta mu/ delta xm). The conditions c=c(t) and m=n are proven to be necessary. It is shown that every Miura transformation, admitted by a constant separant equation ut=f, consists of the following three transformations: (i) (t,x,u) to (t,x,w), where w=a(t,x,u,. . .,ux. . .x); (ii) (t,x,w) to (t,y,v), where y=x and v=w, or y=w and v=wx, or y=wx and v=wxx; (iii) a transformation of time s=c(t) and a contact transformation of (y,v). As an example, the Korteweg-de Vries equation is transformed to three new nonlinear equations, of which two have neither nontrivial algebra of generalized symmetries nor infinite set of conserved densities." @default.
- W2127840711 created "2016-06-24" @default.
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- W2127840711 date "1993-04-07" @default.
- W2127840711 modified "2023-10-18" @default.
- W2127840711 title "On Miura transformations of evolution equations" @default.
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- W2127840711 doi "https://doi.org/10.1088/0305-4470/26/7/004" @default.
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