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- W2259545255 abstract "In this note we describe an application of low-high orders in fault-tolerant network design. Baswana et al. [DISC 2015] study the following reachability problem. We are given a flow graph $G = (V, A)$ with start vertex $s$, and a spanning tree $T =(V, A_T)$ rooted at $s$. We call a set of arcs $A'$ valid if the subgraph $G' = (V, A_T cup A')$ of $G$ has the same dominators as $G$. The goal is to find a valid set of minimum size. Baswana et al. gave an $O(m log{n})$-time algorithm to compute a minimum-size valid set in $O(m log{n})$ time, where $n = |V|$ and $m = |A|$. Here we provide a simple $O(m)$-time algorithm that uses the dominator tree $D$ of $G$ and a low-high order of it." @default.
- W2259545255 created "2016-06-24" @default.
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- W2259545255 date "2015-11-24" @default.
- W2259545255 modified "2023-09-27" @default.
- W2259545255 title "A Note on Fault Tolerant Reachability for Directed Graphs" @default.
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- W2259545255 hasPublicationYear "2015" @default.
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