Polynomial-Time Algorithm for Sliding Tokens on Trees
Polynomial-Time Algorithm for Sliding Tokens on Trees
复制标题
树上滑动令牌的多项式时间算法
DOI:
10.1007/978-3-319-13075-0_31
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Takeshi Yamada
中科院分区:
文献类型:
--
作者:
Erik D. Demaine;Martin L. Demaine;Eli Fox-Epstein;Duc A. Hoang;Takehiro Ito;Hirotaka Ono;Yota Otachi;Ryuhei Uehara;Takeshi Yamada
Suppose that we are given two independent setsIandIof a graph such that$${{\varvec{I}}}_{b}$$=I, and imagine that a token is placed on each vertex inI. Then, thesliding tokenproblem is to determine whether there exists a sequence of independent sets which transformsIandIso that each independent set in the sequence results from the previous one by sliding exactly one token along an edge in the graph. This problem is known to be PSPACE-complete even for planar graphs, and also for bounded treewidth graphs. In this paper, we show that the problem is solvable for trees in quadratic time. Our proof is constructive: for a yes-instance, we can find an actual sequence of independent sets betweenIandIwhose length (i.e., the number of token-slides) is quadratic. We note that there exists an infinite family of instances on paths for which any sequence requires quadratic length.
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DOI:
10.1007/978-3-319-08404-6_8
发表时间:
2014
期刊:
ArXiv
影响因子:
--
作者:
P. Bonsma;M. Kaminski;Marcin Wrochna
通讯作者:
Marcin Wrochna
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
R. Hearn;E. Demaine
通讯作者:
E. Demaine
影响因子:
1.1
作者:
P. Bonsma
通讯作者:
P. Bonsma
DOI:
10.1007/978-3-319-13524-3_21
发表时间:
2014
期刊:
--
影响因子:
--
作者:
A. E. Mouawad;N. Nishimura;Venkatesh Raman;Marcin Wrochna
通讯作者:
Marcin Wrochna
DOI:
10.1016/j.tcs.2011.05.021
发表时间:
2011
期刊:
Theor. Comput. Sci.
影响因子:
--
作者:
M. Kaminski;P. Medvedev;Martin Milanič
通讯作者:
Martin Milanič