Constrained multilinear detection for faster functional motif discovery [arxiv] Information Processing Letters 2012
Train marshalling is fixed parameter tractable [pdf]
(with Leo Brueggeman, Michael Fellows, Rudolf Fleischer, Martin Lackner,
Christian Komusiewicz, Andreas Pfandler and Frances Rosamond ) FUN2012
A nearly-m*logn solver for SDD linear systems [ arxiv]
(with Gary Miller, Richard Peng) FOCS 2011
Near linear-work parallel SDD solvers,
low-diameter decomposition and low-stretch subgraphs [pdf]
(with Guy Blelloch, Anupam Gupta, Gary Miller, Richard Peng, Kanat Tangwongsan) SPAA 2011
Spectral counting of triangles in power-law networks
via element-wise sparsification and triangle-based link recommendation [pdf]
(with Charalambos Tsourakakis, Petros Drineas, Eirinaios Michelakis, Christos Faloutsos) Social Network Analysis and Mining ASONAM 2009Conference Version: [pdf]
Approaching optimality for solving SDD systems [arxiv]
(with Gary Miller, Richard Peng) FOCS 2010
Hierarchical Diagonal Blocking with precision reduction applied to combinatorial multigrid[ pdf] (with Guy E. Blelloch, Gary Miller, Kanat Tangwongsan) SC10
Limits and applications of group algebras for parameterized problems [pdf] (with Ryan Williams)
Thefull version of the paper retracts the erroneous claim for the k-leaf problem and addresses other minor issues.
Theoriginal paper can be found here: [pdf] ICALP 2009
Faster algebraic algorithms for path and packing problems [pdf] ICALP 2008
Graph partitioning into isolated, high conductance clusters:
theory, computation and applications to preconditioning [pdf] (with Gary Miller) SPAA 2008
Unassisted Segmentation of Multiple Retinal Layers via Spectral Rounding[pdf] (with David Tolliver, Hiroshi Ishikawa, Joel Shuman, Gary Miller) ARVO 2008
Combinatorial and algebraic tools for optimal multilevel algorithms [pdf] PhD Thesis, CMU-CS-07-131
A linear work O(n^{1/6}) time algorithm for solving planar Laplacians [pdf] (with Gary Miller) SODA 2007
Dimensionality restrictions on sums over Z_{p}^{d} [pdf] Technical Report CMU-CS-07-103
These results were published in a shlightly stronger form in:
''On the number of subsequences with given sum of sequences over finite Abelian $p$-groups'',
by Weidong Gao and Alfred Geroldinger , Rocky Mountain J. Mathematics, 2007 [pdf]
This informal publication discusses the computation of matrix eigenvalues via a descent-through-pseudospectra approach. It represents joint work with E. Gallopoulos, which was presented at FOCM 1999, and at the 5th IMACS conference on iterative methods ( abstract )
Exclusion regions and fast estimation of pseudospectra [pdf]
This work was presented in an invited talk at the 2003 SIAM annual meeting