An algorithm to find optimum support-reducing decompositions for index generation functions
An algorithm to find optimum support-reducing decompositions for index generation functions
复制标题
一种寻找索引生成函数最佳支持减少分解的算法
DOI:
10.23919/date.2017.7927100
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
Y. Iguchi
中科院分区:
文献类型:
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作者:
Tsutomu Sasao;Kyu Matsuura;Y. Iguchi
Index generation functions are useful for pattern matching. This paper presents an algorithm to find support-reducing decompositions for index generation functions. Let n be the number of the input variables, and let s be the number of bound variables. Then, the exhaustive search for finding an optimum support-reducing decomposition requires to check (ns) combinations. We found a special property of index generation functions that drastically reduces this search space. With this property, we developed a fast algorithm. For a given number of bound variables, it finds a decomposition with the fewest rails. Experimental results up to n = 60 and s = 33 are shown.