Celebratio Mathematica

In this Chapter:

• Irene Gamba and Christina Sormani:
  Introduction
• Terence Tao:
  Morawetz inequalities
• Leslie Greengard and Tonatiuh Sánchez-Vizuet:
  Cathleen Morawetz and the scattering of acoustic waves
• Kevin R. Payne:
  Transonic flow and mixed-type partial differential equations
• Christina Sormani:
  Closing Thoughts