# Mathematician:Hubert Stanley Wall

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## Contents

## Mathematician

American mathematician who worked primarily in the field of continued fractions.

One of the leading proponents of the Moore method of teaching.

## Nationality

American

## History

- Born: 2nd December 1902 in Rockwell City, Iowa
- 1924: Received Bachelor of Arts and Master of Arts degrees from Cornell College in Mount Vernon, Iowa
- 1927: Received Ph.D. degree from the University of Wisconsin (now University of Wisconsin–Madison)
- 1927: Joined faculty at Northwestern University
- 1938: Rescued Ernst Hellinger from almost certain death in Dachau by arranging a place for him at Northwestern University
- 1944: Moved to Illinois Institute of Technology
- 1946: Moved to University of Texas
- 1970: Became Emeritus Professor
- Died: 12th September 1971 in Austin, Texas

## Theorems and Definitions

## Publications

- 1927:
*On the Padé Approximants Associated with the Continued Fraction and Series of Stieltjes*(Ph.D. Thesis) - 1929:
*On extended Stieltjes series* - 1931:
*On the Padé approximants associated with a positive definite power series* - 1932:
*Convergence criteria for continued fractions* - 1932:
*General theorems on the convergence of sequences of Padé approximants* - 1932:
*On the relationship among the diagonal files of a Padé table* - 1932:
*On the expansion of an integral of Stieltjes* - 1933:
*On the continued fractions which represent meromorphic functions* - 1938:
*On the $n$th Derivative of $f \left({x}\right)$*(*Bull. Amer. Math. Soc.***Vol. 44**: pp. 395 – 398) (in which Faà di Bruno's Formula is presented) - 1948:
*Analytic Theory of Continued Fractions* - 1963:
*Creative Mathematics*