2010

The Null Condition and Global Existence for Nonlinear Wave Equations on Slowly Rotating Kerr Spacetimes

Luk, Jonathan

Understand

We study a semilinear equation with derivatives satisfying a null condition on slowly rotating Kerr spacetimes.

  • We prove that given sufficiently small initial data, the solution exists globally in time and decays with a quantitative rate to the trivial solution.
  • The proof uses the robust vector field method.
  • It makes use of the decay properties of the linear wave equation on Kerr spacetime, in particular the improved decay rates in the region $\{r\leq \frac{t}{4}\}$.

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