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Richard Peng

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titleconferencedate
A Combinatorial Cut-Toggling Algorithm for Solving Laplacian Linear SystemsITCS 20232023-01-10
Introduces a dual cut-toggling algorithm for solving Lx = b that mirrors KOSZ: it maintains vertex potentials on a low-stretch spanning tree, samples…
Talk on
Scalable Algorithmic Primitives for Data ScienceRandomized Numerical Linear Algebra and Applications 20182018-09-24
Argues that solving graph-structured linear systems becomes practical by combining preconditioning, randomized row sampling and combinatorial sparsifiers…
Talk on
L_p Row Sampling by Lewis WeightsFast Algorithms via Spectral Methods 20142014-12-01
Claims a practical method to sample rows so A' preserves ||Ax||_p for all x by sampling with Lewis weights, shows existence and fast computation, and proves L1…
Talk on
Cut-Approximators, Approximating Undirected Max Flows, and RecursionFast Algorithms via Spectral Methods 20142014-12-01
Presents a concrete recursive recipe that yields a nearly‑linear time (1+ε)-approximation for undirected max flow by combining alpha cut approximator trees…
Talk
An Efficient Parallel Solver for SDD Linear SystemsSpectral Algorithms: From Theory to Practice 20142014-10-27
Presents an algorithm that solves SDD (graph Laplacian) systems with nearly-linear work and polylog depth by building an “approximate inverse chain”…
Talk
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