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arXiv 0902.4640q-bio.PEcs.DM
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树-兄弟时间一致的系统发育网络的比较是图同构完全的

The comparison of tree-sibling time consistent phylogenetic networks is graph isomorphism-complete

Gabriel Cardona, Merce Llabres, Francesc Rossello, Gabriel Valiente

摘要:

在以前的工作中,我们给出了一个度量类的半二叉树兄弟时间一致的系统发育网络,是可计算的多项式时间,特别是,问题的决定,如果两个网络的这种同构是在P.在本文中,我们表明,如果我们删除上述的半二进制条件,那么这个问题变得更加困难。更准确地说,我们证明了同构问题的通用树兄弟时间一致的系统发育网络是多项式等价的图同构问题。由于后者被认为既不是P也不是NP完全的,所以很可能不可能定义一个可以在多项式时间内计算的所有树兄弟时间一致的系统发育网络的度量。

英文摘要:

In a previous work, we gave a metric on the class of semibinary tree-sibling time consistent phylogenetic networks that is computable in polynomial time; in particular, the problem of deciding if two networks of this kind are isomorphic is in P. In this paper, we show that if we remove the semibinarity condition above, then the problem becomes much harder. More precisely, we proof that the isomorphism problem for generic tree-sibling time consistent phylogenetic networks is polynomially equivalent to the graph isomorphism problem. Since the latter is believed to be neither in P nor NP-complete, the chances are that it is impossible to define a metric on the class of all tree-sibling time consistent phylogenetic networks that can be computed in polynomial time.

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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