# Mathematics Colloquia and Seminars

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### Cumulant-Topological Approaches to Random Matrices

**Mathematical Physics & Probability**

Speaker: | Emily Redelmeier |

Location: | 2112 MSB |

Start time: | Fri, Jun 5 2015, 3:00PM |

I will discuss topological expansions for multi-matrix expressions, considering the real, complex, and quaternionic cases. Matrix cumulants, developed by Capitaine and Casalis ('06, '07) can be thought of as vertex factors associated with a topological diagram. This approach allows expressions with several independent matrices to be computed in terms of the matrix cumulants of the individual ensembles, which are often simple quantities. I will show how this approach is useful in multi-matrix contexts such as free probability.