Provide a class to assess DAGs for mathematical expressions. Use a vertex-indexed array to store values for every vertex. Suppose that values for leaves have already been determined. Explain a family of mathematical expressions where the expression tree's size is exponentially bigger than the matching DAG's size (so the running time of your programme for the DAG is proportional to the logarithm of the running time for the tree).
Provide a class to assess DAGs for mathematical expressions. Use a vertex-indexed array to store values for every vertex. Suppose that values for leaves have already been determined. Explain a family of mathematical expressions where the expression tree's size is exponentially bigger than the matching DAG's size (so the running time of your programme for the DAG is proportional to the logarithm of the running time for the tree).
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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Provide a class to assess DAGs for mathematical expressions. Use a vertex-indexed array to store values for every vertex. Suppose that values for leaves have already been determined. Explain a family of mathematical expressions where the expression tree's size is exponentially bigger than the matching DAG's size (so the running time of your programme for the DAG is proportional to the logarithm of the running time for the tree).
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