Edson Cáceres

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In this paper we present a coarse-grained parallel algorithm for solving the string edit distance problem for a string A and all substrings of a string C. Our method is based on a novel CGM/BSP parallel dynamic programming technique for computing all highest scoring paths in a weighted grid graph. The algorithm requires \log p rounds/supersteps and(More)
Given two strings and of lengths Ñ and Ò, respectively , the all-substrings longest common subsequence (ALCS) problem obtains the lengths of the subsequences common to and any substring of. The sequential algorithm takes Ç´ÑÒµ time and Ç´Òµ space. We present a parallel algorithm for ALCS on a coarse-grained multi-computer (BSP/CGM) model with Ô Ô Ô Ñ(More)
In this paper we present deterministic parallel algorithms for the coarse-grained multicomputer (CGM) and bulk synchronous parallel (BSP) models for solving the following well-known graph problems: (1) list ranking, (2) Euler tour construction in a tree, (3) computing the connected components and spanning forest, (4) lowest common ancestor preprocessing,(More)
In this paper we present a parallel wavefront algorithm for computing an alignment between two strings A and C, with |A| = m and |C| = n. On a distributed memory parallel computer of p processors each with O((m + n)/p) memory, the proposed algorithm requires O(p) communication rounds and O(mn/p) local computing time. The novelty of this algorithm is based(More)
In this paper, we present parallel algorithms for the coarse grained multicomputer (CGM) and bulk synchronous parallel computer (BSP) for solving two w ell known graph problems: (1) determining whether a graph G is bipartite, and (2) determining whether a bipartite graph G is convex. Our algorithms require O(log p) a n d O(log 2 p) communication rounds,(More)