Here I am talking about total positivity at UMN's Student Combinatorics and Algebra Seminar.
My name is Robert Angarone, but you can call me Robbie.
I'm a third-year PhD student in the school of mathematics at the University of Minnesota. My advisor is Pasha Pylyavskyy. My primary research interest is algebraic combinatorics. I especially enjoy representation theory, symmetric functions, total positivity, matroids, and unimodal/log-concave sequences.
Before coming to Minnesota, I majored in math and philosophy at Macalester College. While there, I wrote an honors thesis concerning some objects in bijection with totally symmetric self-complementary plane partitions. Andrew Beveridge was my advisor.
My email is angar017 (at) umn (dot) edu.
In Winter 2023, I participated in the Workshop on Matroids and Tropical Combinatorics in London; I also gave a presentation there.
In Fall 2022, I passed my preliminary oral exam with a presentation titled "Weakly Interlacing Polynomials and Total Nonnegativity."
In Summer 2022, I participated in the Summer School in Algebraic Combinatorics in Kraków. I also helped to organize a combinatorics research workshop with fellow graduate students Sylvester Zhang and Trevor Karn.
Last school year (2021-2022), I helped to organize UMN's Student Combinatorics and Algebra Seminar. The current website is here.
Teaching and Mentorship
This semester (Spring 2023), I am a TA for MATH 1051: Precalculus I and MATH 1031: College Algebra and Probability. If you are a student in one of these courses, please see our course Canvas page for more information.
In Fall 2022, I was the lead instructor for MATH 1051: Precalculus I. I wa salso a DRP mentor.
In Summer 2022, I was a TA for Minnesota's combinatorics REU.
In Spring 2022, I was a TA for MATH 3283W: Sequences, Series, and Foundations. I was also a DRP mentor for a project on surreal numbers in John Conway's On Numbers and Games.
In Fall 2021, I was a TA for MATH 3283W: Sequences, Series, and Foundations. I was also a DRP mentor for a project on partition theory and Rogers–Ramanujan identities.
In Spring 2021, I was a TA for MATH 1272: Calculus II.
In Fall 2020, I was a TA for MATH 1271: Calculus I.
November 2022: Weakly Interlacing Polynomials and Total Nonnegativity, UMN preliminary oral exam presentation.
September 2022: Immanants imminent!, 5-minute expository "lightning talk" at the UMN Student Combinatorics and Algebra Seminar.
April 2020: Stacking Blocks: Natural bijections via triangular families, Macalester College honors thesis defense. Slides (click 'present').
I'm a music-lover, audiophile, and (formerly) a radio host. Some of my favorite artists are Charles Mingus, Kate Bush, and Sweet Trip.
I am in the process of collecting every album, EP, and single (in every format) released by harpist Joanna Newsom. If you own an original CD copy of 2002's Walnut Whales, I will buy it from you.*
*For a fair price.