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Cruz Castillo

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Hello! My name is Cruz Castillo, and I am a 3rd year PhD student at UIUC in Number Theory. I am also a Sloan Scholar and a NSF GRFP recipient. Modular forms, Maass forms, and L-functions are all of great interest to me. Scott Ahlgren is my advisor.


Here is a list of my recent research projects. For more information such as slides, posters, and graphs please click the research tab above.

I am also a co-organizer of the Graduate Number Theory Seminar.


I was a TA for Calculus 1 from Fall 2021 to Spring 2022. I was ranked excellent by students all semesters.