- #1
mess1n
- 24
- 0
Hey, I've come across a part in my notes which I can't figure out. Essentially it says:
[tex]\frac{\partial^{2}y}{\partial t^{2}}[/tex] = v[tex]^{2} [/tex] . [tex]\frac{\partial^{2}y}{\partial x^{2}}[/tex] is space and time invariant.
Whereas:
[tex]\frac{\partial y}{\partial t}[/tex] = -v . [tex]\frac{\partial y}{\partial x}[/tex] is not.
Why is this the case?
Cheers,
Andrew
[tex]\frac{\partial^{2}y}{\partial t^{2}}[/tex] = v[tex]^{2} [/tex] . [tex]\frac{\partial^{2}y}{\partial x^{2}}[/tex] is space and time invariant.
Whereas:
[tex]\frac{\partial y}{\partial t}[/tex] = -v . [tex]\frac{\partial y}{\partial x}[/tex] is not.
Why is this the case?
Cheers,
Andrew