# Mathematician:Herbert Saul Wilf

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## Mathematician

American mathematician who specializes in combinatorics and graph theory.

He has made available certain of his works for free download.

## Nationality

American

## History

- Born: 13 June 1931 in Philadelphia, Pennsylvania
- Died: 7 January 2012 in Wynnewood, Pennsylvania

## Theorems and Definitions

- Calkin-Wilf Tree (with Neil James Calkin)
- Szekeres-Wilf Number (with George Szekeres)

Definitions of concepts named for **Herbert Saul Wilf** can be found here.

## Publications

- 1962:
*Mathematics for the Physical Sciences* - 1968:
*An Inequality for the Chromatic Number of a Graph*(with George Szekeres) - 1986:
*Algorithms and Complexity* - 1990:
*generatingfunctionology* - 1996:
*A=B*(with Doron Zeilberger and Marko Petkovšek)

- 1998:
*The Number of Independent Sets in a Grid Graph*(*SIAM Journal on Discrete Mathematics***Vol. 11**,*no. 1*: pp. 54 – 60) (with Neil J. Calkin)

- 2000:
*Recounting the Rationals*(*Amer. Math. Monthly***Vol. 107**,*no. 4*: pp. 360 – 363) (with Neil J. Calkin)