Eduardo Hector Zarantonello Lanari, Argentine mathematician (Buenos Aires 04 June 1918 – Mendoza 13 January 2010)
Son of Italian immigrants
With G. Birkhoff wrote Jets, Wakes and Cavities (1957), a classical book on advanced topics of theoretical hydrodynamics
INTRODUCED
A constructive theorem for the equations of flows with free boundaries (1950)
Monotone operators (1960) independent from Kachurovsky (1960) & Minty (1962)
Monotone maps (1960) independent from Vainberg & Kachurovsky
Generalized projection operator
Concept of numerical range of non-linear Hilbert space operators (1964)
EPONYMY
Zarantonello inequality
Zarantonello theorem (1960)
Zarantonello numerical range
Zarantonello condition