## Andrew Krenz

##

I'm a grad student at the University of Wisconsin-Madison. I studied math at Purdue University from 2014-2018. My thesis advisor is Tullia Dymarz. You can contact me at krenz3@wisc.edu

#### Research Interests

I'm interested in group homology, coarse homology theories, applications of groupoids to group theory, hyperbolic geometry and hyperbolic groups.

### Teaching

Term |
Course |

Fall 2018 |
Math 221: Calculus 1 |

Spring 2019 |
Math 221 (TA coordinator) |

Fall 2019 |
Math 234: Multivariable Calculus (TA coordinator) |

Spring 2020 |
Math 222: Calculus 2 (TA coordinator) |

Summer 2020 |
Math 221 |

Here are some notes I took while studying over the past few years. I tried to draw pitures whenever possible. Sorry if there are any errors.

#### Algebra

#### Hatcher: Algebraic Topology

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#### Algebraic Topology Qual

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#### Bridson & Haefliger: Metric Spaces of Nonpositive Curvature

#### Higgins: Categories & Groupoids