| Author |
Comment/Response |
blenx
|
 04/11/12 03:39am
The exact solution of the partial differential equation
D[y[x,t],t,x]==x^2
with initial and boundary condition
{Derivative[0,1][y][x,0]==Cos[x] , y[0,t]==Sin[t]}
is y[x,t]=Sin[x]+Sin[t]+t*x^3/3.
This solution is not diffcult to obtained. But I found this problem cannot be solved with DSolve and NDSolve. Here is my code:
DSolve[{D[y[x,t],t,x]==x^2,Derivative[0,1][y][x,0]==Cos[x] , y[0,t]==Sin[t]},y,{x,t}]
and the output is the repeat of my code.
NDSolve[{D[y[x,t],t,x]==x^2,Derivative[0, 1][y][x, 0]==Cos[x] , y[0,t]==Sin[t]},y,{x,0,10},{t,0,10}]
and the output is:
NDSolve::bdord:
...............
What's going wrong?
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