Walter Gautschi (/ˈɡaʊ̯tʃi/; GOW-chee; born December 11, 1927) is a Swiss-born American mathematician, writer and professor emeritus of Computer science and Mathematics at Purdue University in West Lafayette, Indiana.
He completed a Ph.D. in mathematics from the University of Basel on the thesis Analyse graphischer Integrationsmethoden advised by Alexander Ostrowski and Andreas Speiser (1953).
[4] Since then, he did postdoctoral work as a Janggen-Pöhn Research, Fellow at the Istituto Nazionale per le Applicazioni del Calcolo in Rome (1954) and at the Harvard Computation Laboratory (1955).
Intelligencer, etc), one of Gautschi's most important contributions on numerical simulation of special functions offered evidence and confidence to de Branges's tour-de-force attack on the elusive Bieberbach conjecture on the magnitude of coefficients of schlicht functions, which hitherto received only slow, difficult and partial progress by work of Bieberbach, Loewner, Gabaredian and Schiffer.
After his sudden death, Erika returned to Switzerland, while being pregnant with her child to Basel where she met Walter and married him in 1960.