- #1
BustedBreaks
- 65
- 0
Is this linear homogeneous, linear inhomogeneous etc...
[tex]u_{t}-u_{xx}+xu=0[/tex]
From that first one I get this
[tex]\frac{u_{t}-u_{xx}}{u}=-x[/tex]
which I'm not sure is linear.
Edit:
Similar questions involve the following equations:
[tex]iu_{t}-u_{xx}+\frac{u}{x}=0[/tex]
and
[tex]u_{x}+e^{y}u_{y}=0[/tex]
Another Edit:
I think I see the answer. I can rewrite the first equation like this:
[tex](u_{t}-u_{xx}+xu)(\frac{1}{x})=0(\frac{1}{x})[/tex]
and get a linear equation:
[tex]\frac{u_{t}}{x}-\frac{u_{xx}}{x}+u=0[/tex]
UGH... Another Edit..
I'm not sure which approach is correct, the first or the second...
[tex]u_{t}-u_{xx}+xu=0[/tex]
From that first one I get this
[tex]\frac{u_{t}-u_{xx}}{u}=-x[/tex]
which I'm not sure is linear.
Edit:
Similar questions involve the following equations:
[tex]iu_{t}-u_{xx}+\frac{u}{x}=0[/tex]
and
[tex]u_{x}+e^{y}u_{y}=0[/tex]
Another Edit:
I think I see the answer. I can rewrite the first equation like this:
[tex](u_{t}-u_{xx}+xu)(\frac{1}{x})=0(\frac{1}{x})[/tex]
and get a linear equation:
[tex]\frac{u_{t}}{x}-\frac{u_{xx}}{x}+u=0[/tex]
UGH... Another Edit..
I'm not sure which approach is correct, the first or the second...
Last edited: