Robert Breusch, Date of Birth, Date of Death
TweetRobert Breusch
German-American mathematician
Date of Birth: 02-Apr-1907
Date of Death: 29-Mar-1995
Profession: mathematician
Nationality: United States
Zodiac Sign: Aries 
About Robert Breusch
- Robert Hermann Breusch (April 2, 1907 – March 29, 1995) was a German-American number theorist, the William J.
- Walker Professor of Mathematics at Amherst College.Breusch was born in Freiburg, Germany, and studied mathematics both at the University of Freiburg and the University of Berlin.
- Unable to secure a university position after receiving his doctorate, Breusch became a schoolteacher near Freiburg, where he met his future wife, Kate Dreyfuss; Breusch was Protestant, but Dreyfuss was Jewish, and the two of them left Nazi Germany for Chile in the mid-1930s.
- They married there, and Breusch found a faculty position at Federico Santa MarÃa Technical University in Valparaiso.
- In 1939, they left Chile for the United States, inviting Robert Frucht to take Breusch's place at Santa MarÃa; after some years working again as a schoolteacher, Breusch found a position at Amherst College in 1943.
- He became the Walker professor in 1970, and retired to become an emeritus professor in 1973.
- The Robert H.
- Breusch Prize in Mathematics, for the best senior thesis from an Amherst student, was endowed in his memory.As a mathematician, Breusch was known for his new proof of the prime number theorem and for the many solutions he provided to problems posed in the American Mathematical Monthly.
- His thesis work combined Bertrand's postulate with Dirichlet's theorem on arithmetic progressions by showing that each of the progressions 3i + 1, 3i + 2, 4i + 1, and 4i + 3 (for i = 0, 1, 2, ...) contains a prime number between x and 2x for every x = 7.
- For instance, he proved that for n > 47 there is at least one prime between n and (9/8)n.
- He also wrote a calculus textbook, Calculus and Analytic Geometry with Applications (Prindle, Weber & Schmidt, 1969) with C.
- Stanley Ogilvy.
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