We are given a directed graph G = (V, E) on which each edge (u, v) ¬ E has an associated value r(u, v), which is a real number in the range 0 ≤ r(u, v) ≤ 1 that represents the reliability of a communication channel from vertex u to vertex v. We interpret r(u, v) as the probability that the channel from u to v will not fail, and we assume that these probabilities are independent. Give an efficient algorithm to find the most reliable path between two given vertices.
Answer to relevant QuestionsState the type rules for the assignment (“: =”) and equality comparison (“=”) operators. Repeat Exercise 5.6 but make the operator an update operator.What do you understand by the term cardinality?We have seen that data definition operations cause updates to be made to the catalog. But the catalog is only a collection of relvars, just like the rest of the database; so could we not use the regular update operations ...In ordinary arithmetic, multiplication and division are inverse operation. Are times and divide by inverse operations in the relation algebra?
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