- #1
frozenguy
- 192
- 0
Hey.. I ran across some problems and the notation used is a little different from what I've seen before.
considering U(x,y)=X(x)Y(y)
Sometimes I'll see Uxx for [tex]\frac{d^{2}u}{dt^{2}}[/tex] which equals X''Y
Or Ux for [tex]\frac{du}{dt}[/tex] which equals X'Y
But what about U'x
Is that a redundant way of saying the partial derivative of U with respect to x?
Or is it saying the derivative of the partial derivative of U with respect to x?
As I originally read it, I considered it X'Y, but now I'm wondering if maybe its X"Y.
Thanks!
considering U(x,y)=X(x)Y(y)
Sometimes I'll see Uxx for [tex]\frac{d^{2}u}{dt^{2}}[/tex] which equals X''Y
Or Ux for [tex]\frac{du}{dt}[/tex] which equals X'Y
But what about U'x
Is that a redundant way of saying the partial derivative of U with respect to x?
Or is it saying the derivative of the partial derivative of U with respect to x?
As I originally read it, I considered it X'Y, but now I'm wondering if maybe its X"Y.
Thanks!