2022

Speeding Up Sparsification using Inner Product Search Data Structures

Song, Zhao, Xu, Zhaozhuo, Zhang, Lichen

Understand

We present a general framework that utilizes different efficient data structures to improve various sparsification problems involving an iterative process.

  • We also provide insights and characterization for different iterative process, and answer that when should we use which data structures in what type of problem.
  • We obtain improved running time for the following problems.
  • * For constructing linear-sized spectral sparsifier (Batson, Spielman and Srivastava, 2012), all the existing deterministic algorithms require $\Omega(d^4)$ time.

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