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Questions about partial differential equations of hyperbolic type. Often used in combination with the top-level tag ap.analysis-of-pdes.

4 votes
Accepted

On a conjecture of Lions for the wave equation

You will find your answer in this article: http://www.sciencedirect.com/science/article/pii/0022247X89902059
Michael Renardy's user avatar
4 votes
Accepted

Crandall & Rabinowitz Theorem, bifurcation curves

Here is a simple example in $R^2$: $G(u)=(-u_1+u_2^3,u_2-u_1^3)$.
Michael Renardy's user avatar
1 vote

A hyperbolic partial differential equation (wave-like) with variable-dependent coefficient a...

If $\epsilon$ is not zero, you need initial conditions in the $\phi$ direction. In general, the resulting solutions will oscillate rapidly when $\epsilon$ is small. Your formal expansion in powers of …
Michael Renardy's user avatar
1 vote
Accepted

Regularity of solution to a hyperbolic pde

If you want f to take values in $V^*$ rather than $H$, you can do this if you assume more temporal regularity on f. Basically, the idea is to integrate by parts in the term $\int_0^t \langle u',f\rang …
Michael Renardy's user avatar