# Mathematician:Fritz John

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## Contents

## Mathematician

German mathematician best known for his work on partial differential equations and ill-posed problems.

## Nationality

German

## History

- Born: 14 June 1910, Berlin, Germany
- Died: 10 February 1994, New York, USA

## Theorems and Definitions

## Publications

- 1934:
*Determining a Function from its Integrals over Certain Manifolds*

- 1938:
*The Ultrahyperbolic Differential Equation with Four Independent Variables*(*Duke Math. J.***Vol. 4**,*no. 2*: pp. 300 – 322)