Faster stochastic trace estimation with a Chebyshev product identity
Faster stochastic trace estimation with a Chebyshev product identity
复制标题
使用切比雪夫产品恒等式更快地进行随机迹线估计
DOI:
10.1016/j.aml.2021.107246
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发表时间:
2021
影响因子:
3.7
通讯作者:
Hallman, Eric
中科院分区:
文献类型:
--
作者:
Hallman, Eric
Methods for stochastic trace estimation often require the repeated evaluation of expressions of the form z T p n (A) z, where A is a symmetric matrix and p n is a degree n polynomial written in the standard or Chebyshev basis. We show how to evaluate these expressions using only⌈ n∕ 2⌉ matrix–vector products, thus substantially reducing the cost of existing trace estimation algorithms that use Chebyshev interpolation or Taylor series.