Hi ,

I would like to resolve the Kortweg and de Devries equation :

> **KDV2:= diff( u(X,T), T)+ 6*u(X,T)*diff(u(X,T),X)+ diff(u(X,T),X$3);**

I used pdsolve but I have a problem to enter the IBC :

I want

u(infinity, t) =0

u( -infinity, t )=0

u ( x, 0 ) = 1

So I did :

> **SOL:=pdsolve(diff( u(X,T), T)+ 6*u(X,T)*diff(u(X,T),X)+ diff(u(X,T),X$3)=0,{u(-10, T) = 0, u(10, T) = 0, u(X, 0) =1},numeric,time=T,range=-10..10);**

But it doesn't work.

( I remplace infinity by 10 because then I want the graphic representation of the solution )

Could you help me please ?