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# Geometric Analysis and Partial Differential Equations Seminar

## October 8, 2013 @ 10:30 am - 11:30 pm

##### Speaker

Prof. Alan McIntosh (The Australian National University)

##### Title

Finite speed of propagation for first order systems, and Huygens’ principle for hyperbolic equations

##### Abstract

I will present a new approach to proving finite propagation speed for first order systems, and show how this can be applied to obtain a weak Huygens’ principle for certain second order hyperbolic equations. This is joint work with Andrew Morris.