Papers and Preprints:




Peer-Reviewed Papers:

A representation-theoretic computation of the rank of 1-intersection incidence matrices: 2-subsets vs. n-subsets.  (with C. Sherwood)
    To appear, Comm. Algebra pdf

Integer diagonal forms for subset intersection relations.  (with L. Engelthaler, J. Gathje, B. Jones, I. Pfaff, J. Plute)
    Algebr. Comb., Vol. 8 (2025), no. 1, pp. 29-57 pdf

Critical group structure from the parameters of a strongly regular graph.  (with D. Duncan, W. Engelbrecht, J. Madan, E. Piato, C. Shatford, A.Vichitbandha)
    J. Combin. Theory Ser. A, Vol. 180, 2021, 105424 pdf (journal link)

The critical group of the Kneser graph on 2-subsets of an n-element set.  (with I. Hill and P. Sin)
    Linear Algebra Appl.  546 (2018) 154-168 pdf

The Smith group and the critical group of the Grassmann graph on lines in finite projective space and of its complement.  (with P. Sin)
    Bull. Inst. Math. Acad. Sin. (N.S.)  13 (4) (2018) 411-442. pdf

On the critical group of the missing Moore graph.
    Discrete Math. 340 (2017), no.5, 1104-1109 pdf

Integer invariants of an incidence matrix related to Rota's basis conjecture.  (with S. Bittner, X. Guo, M. Oh, A. Zweber)
  Missouri J. Math. Sci. 29 (2017), no. 1, 27-32 pdf

The Smith and critical groups of the square Rook's graph and its complement.  (with J. Gerhard and N. Watson)
    Electron. J. Combin. 23(4) (2016), #P4.9  pdf

Integer invariants of abelian Cayley graphs.  (with D. Jalil)
    Linear Algebra Appl.  445 (2014) 316-325 pdf

The elementary divisors of the incidence matrix of skew lines in PG(3,q).  (with A. E. Brouwer and P. Sin)
    Proc. Amer. Math. Soc. 140 (2012) 2561-2573 pdf

Problems in algebraic combinatorics. (Dissertation) pdf

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