[PDE] Transforming Hard Equations into Easier Ones

[Arkuski]

I have a PDE and I have to transform it into an easier one using a substitution:

u_t=u_{xx}-\beta u

I am supposed to use the following substitution:

u(x,t)=e^{-\beta t}w(x,t)

I am supposed to get something that looks like this:

w_t=w_{xx}

Can someone show me the steps?

 

[Ray Vickson]

I have a PDE and I have to transform it into an easier one using a substitution:

u_t=u_{xx}-\beta u

I am supposed to use the following substitution:

u(x,t)=e^{-\beta t}w(x,t)

I am supposed to get something that looks like this:

w_t=w_{xx}

Can someone show me the steps?

Here are the steps. Substitute the form $u(x,t) = e^{-\beta t}w(x,t)$ into all terms of the PDE and collect terms. That means you will need to compute $u_t$ and $u_{xx}$ using standard calculus differentiation rules.