On Tue, Feb 14, 2012 at 9:14 PM, Michael Brown <[email protected]
> wrote:

>  I don't think you need to split between the x and u parts of f as long as
>> you can construct a g such that g_x = f. g can be arbitrary.
>>
>>
>
> Okay, but the problem is f depends on u, so to solve g_x = f(u(x, t), x) I
> need to know u, the unknown!
>

You're quite right! What I said doesn't make any sense. As you say, the
right way is to split it an integrate in time, which seems reasonable. It
remains local that way.


-- 
Daniel Wheeler
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