## Staffy Group Title Solve (∂^2u/∂x^2) + (∂^2u/∂y^2) = 0 in y > 0 and −∞ < x < ∞ with u(x, 0) = f(x). one year ago one year ago

1. zordoloom Group Title

Is this Calc or Diff eq?

2. zordoloom Group Title

You still there?

3. zordoloom Group Title

I'm willing to work through this with you. A reply would be nice.

4. Staffy Group Title

It's differential equations, it's for a mathematical physics class

5. r0n4ld Group Title

the classic example of $$\displaystyle \frac{\partial^2 u }{\partial x^2}+\frac{\partial^2 u }{\partial y^2}=0$$ is $$\displaystyle u(x,y)=e^x \cos y + e^y \sin y$$

6. Staffy Group Title

Sorry, I should specify that we are using fourier transforms to solve these problems