# Ruth Moufang

**Ruth Moufang** (January 10, 1905 – November 26, 1977) was a German mathematician.

Ruth Moufang | |
---|---|

Born | |

Died | November 26, 1977 72) | (aged

Nationality | |

Alma mater | Goethe University Frankfurt |

Known for | Moufang plane Moufang polygon Moufang–Lie algebra Moufang loop |

Scientific career | |

Fields | Mathematics |

Institutions | Goethe University Frankfurt |

Doctoral advisor | Max Dehn |

## Education and career

Born to a German chemist Dr. Eduard Moufang and Else Fecht Moufang, she studied mathematics at the University of Frankfurt. In 1931 she received her Ph.D. on projective geometry under the direction of Max Dehn, and in 1932 spent a fellowship year in Rome. After her year in Rome, she returned to Germany to lecture at the University of Königsberg and the University of Frankfurt.

Denied permission to teach by the minister of education of Nazi Germany, she worked in private industry until 1946, when she became the first woman professor at the University of Frankfurt.

## Research

Moufang's research in projective geometry built upon the work of David Hilbert. She was responsible for ground-breaking work on non-associative algebraic structures, including the Moufang loops named after her.

In 1933 Moufang showed Desargues's theorem does not hold in the Cayley plane. The Cayley plane uses octonion coordinates which do not satisfy the associative law. Such connections between geometry and algebra had been previously noted by Karl von Staudt and David Hilbert. Ruth Moufang thus initiated a new branch of geometry called Moufang planes.

## References

- O'Connor, John J.; Robertson, Edmund F., "Ruth Moufang",
*MacTutor History of Mathematics archive*, University of St Andrews. - Ruth Moufang at the Mathematics Genealogy Project
- "Ruth Moufang", Biographies of Women Mathematicians, Agnes Scott College
- Bhama Srinivasan (1984) "Ruth Moufang, 1905—1977" Mathematical Intelligencer 6(2):51–5.