# H. J. Ryser

**Herbert John Ryser** (July 28, 1923 – July 12, 1985) was a professor of mathematics, widely regarded as one of the major figures in combinatorics in the 20th century.[1][2] He is the namesake of the Bruck–Ryser–Chowla theorem, Ryser's formula for the computation of the permanent of a matrix, and Ryser's conjecture.

Herbert John Ryser | |
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Born | |

Died | July 12, 1985 61) | (aged

Alma mater | University of Toronto |

Scientific career | |

Fields | Mathematics |

Institutions | University of Wisconsin–Madison |