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- W2034777450 abstract "Given two trees, a guest tree G and a host tree H , the subtree isomorphism problem is to determine whether there is a subgraph of H that is isomorphic to G . We present a randomized parallel algorithm for finding such an isomorphism, if it exists. The algorithm runs in time O(log 3 n ) on a CREW PRAM, where n is the number of nodes in H . The number of processors required by the algorithm is polynomial in n . Randomization is used (solely) to solve each of a series of bipartite matching problems during the course of the algorithm. We demonstrate the close connection between the two problems by presenting a log-space reduction from bipartite perfect matching to subtree isomorphism. Finally, we present some techniques to reduce the number of processors used by the algorithm." @default.
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- W2034777450 date "1990-11-01" @default.
- W2034777450 modified "2023-09-29" @default.
- W2034777450 title "Subtree isomorphism is in random NC" @default.
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- W2034777450 doi "https://doi.org/10.1016/0166-218x(90)90081-m" @default.
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