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arXiv 1209.2184cs.DScs.CCcs.NAmath.NA
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快速矩形矩阵乘法通信成本的图扩展分析

Graph Expansion Analysis for Communication Costs of Fast Rectangular Matrix Multiplication

University of California, Berkeley(加州大学伯克利分校);Technische Universität Berlin(柏林工业大学)

Grey Ballard, James Demmel, Olga Holtz, Benjamin Lipshitz, Oded Schwartz

AI总结:

本文通过图扩展分析方法,为快速矩形矩阵乘法算法推导通信成本下界,并证明部分下界最优。

摘要:

计算有向无环图的图扩展分析对于在几何嵌入等传统方法不适用的情况下获得通信成本下界非常有用。最近,这种方法已被证明适用于Strassen及其类似快速方阵乘法算法。本文我们将扩展分析推广到快速矩形矩阵乘法算法,得到了一类新的通信成本下界。这些下界适用于例如Bini等人(1979)的算法以及Hopcroft和Kerr(1971)的算法。我们证明了其中一些下界是最优的。

英文摘要:

Graph expansion analysis of computational DAGs is useful for obtaining communication cost lower bounds where previous methods, such as geometric embedding, are not applicable. This has recently been demonstrated for Strassen's and Strassen-like fast square matrix multiplication algorithms. Here we extend the expansion analysis approach to fast algorithms for rectangular matrix multiplication, obtaining a new class of communication cost lower bounds. These apply, for example to the algorithms of Bini et al. (1979) and the algorithms of Hopcroft and Kerr (1971). Some of our bounds are proved to be optimal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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