Liubomir Chiriac 

Liubomir Chiriac


Office: FMH 462N
Phone: 503-725-3652
Email: chiriac at pdx dot edu

I am an Assistant Professor at Portland State University in the Fariborz Maseeh Department of Mathematics and Statistics. Prior to PSU, I was a postdoc at UMass Amherst. I received my PhD from Caltech, under the direction of Dinakar Ramakrishnan. Before that, I was an undergraduate at Princeton University.

My research interests are in number theory, with a focus on automorphic forms and Galois representations. 


  •   Summing Hecke eigenvalues over polynomials
          (joint with Liyang Yang)
          ( pdf )
  •   Newton Polygons of Hecke operators
          (joint with Andrei Jorza)
          Annales mathématiques du Québec (2020)
          ( pdf  |  journal  |  view-only )
          Data on the 2-adic valuations of the trace of T2 is available here

  •   Comparing Hecke coefficients of automorphic representations
          (joint with Andrei Jorza)
          Transactions of the American Mathematical Society (2019)
          ( pdf  |  journal )

  •   On the equality case of the Ramanujan Conjecture for Hilbert modular forms
          International Journal of Number Theory (2019)
          ( pdf  |  journal )

  •   On the number of dominating Fourier coefficients of two newforms
          Proceedings of the American Mathematical Society (2018)
          ( pdf  |  journal )

  •   Comparing Hecke eigenvalues of newforms
          Archiv der Mathematik (2017)
          ( pdf  |  journal )

  •   Irreducible adjoint representations in prime power dimensions, with an application
          Journal of the Ramanujan Mathematical Society (2015)
          ( pdf  |  journal )

  •   Central Critical values of twists of CM elliptic curves
          (joint with Farshid Hajir and Paul Gunnells)
          In preparation