Input: G = (V,E), a directed graph V ⊆ V , the input subset Output: W ⊆ V , the main result obs : Map(V,V ), the final labeling Variables: L ⊆ V , a worklist of nodes to be treated C ⊆ V , a set of candidate V -weakly deciding vertices Δ ⊆ V , a set of new V -weakly deciding vertices Ensures: W = V ∪ WDG(V ) Ensures: ∀u, v ∈ V, obs[u] = v ⇐⇒ v ∈ obsG(u, W)
Input: G = (V,E), a directed graph V ⊆ V , the input subset Output: W ⊆ V , the main result obs : Map(V,V ), the final labeling Variables: L ⊆ V , a worklist of nodes to be treated C ⊆ V , a set of candidate V -weakly deciding vertices Δ ⊆ V , a set of new V -weakly deciding vertices Ensures: W = V ∪ WDG(V ) Ensures: ∀u, v ∈ V, obs[u] = v ⇐⇒ v ∈ obsG(u, W)
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Input: G = (V,E), a directed graph
V ⊆ V , the input subset
Output: W ⊆ V , the main result
obs : Map(V,V ), the final labeling
Variables: L ⊆ V , a worklist of nodes to be treated
C ⊆ V , a set of candidate V
-weakly deciding vertices
Δ ⊆ V , a set of new V
-weakly deciding vertices
Ensures: W = V ∪ WDG(V
)
Ensures: ∀u, v ∈ V, obs[u] = v ⇐⇒ v ∈ obsG(u, W)
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