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International Conference on Information Technology: Coding and Computing
Coding k-ary Trees for Efficient Loopless Generation in Lexicographic Order
Las Vegas, Nevada
April 08-April 10
ISBN: 0-7695-1506-1
Limin Xiang, Kyushu Sangyo University
Kazuo Ushijima, Kyushu Sangyo University
Yuichi Asahiro, Kyushu Sangyo University
In this paper, {\em e-word}s are used for coding $k$-ary trees with $n$ internal nodes. The properties of e-words are discussed in depth, such as the necessary and sufficient condition of e-words, and based on the properties, a loopless algorithm is obtained to generate e-words for $k$-ary trees in lexicographic order, which is more efficient in both space and time than the previous algorithm. In addition, e-words can also be easily generated in lexicographic order by a recursive algorithm, and in the order with the Strong Minimal Change Property (SMCP) by a loopless algorithm.
Index Terms:
coding $k$-ary trees; loopless generation; lexicographic order
Citation:
Limin Xiang, Kazuo Ushijima, Yuichi Asahiro, "Coding k-ary Trees for Efficient Loopless Generation in Lexicographic Order," itcc, pp.0396, International Conference on Information Technology: Coding and Computing, 2002
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