Morawetz, Cathleen Synge Mathematics to the rescue (retiring presidential address). (English) Zbl 1194.01037 Notices Am. Math. Soc. 46, No. 1, 9-16 (1999). Summary: This article, based on the 1997 AMS Retiring Presidential Address, describes some problems in partial differential equations that have interested the author for a long period of time and on which some progress has been made. MSC: 01A60 History of mathematics in the 20th century 00A69 General applied mathematics 35-03 History of partial differential equations 47A40 Scattering theory of linear operators 76Mxx Basic methods in fluid mechanics 65M06 Finite difference methods for initial value and initial-boundary value problems involving PDEs 76H05 Transonic flows 76L05 Shock waves and blast waves in fluid mechanics PDFBibTeX XMLCite \textit{C. S. Morawetz}, Notices Am. Math. Soc. 46, No. 1, 9--16 (1999; Zbl 1194.01037)