1. Program modules can import other modules. [You have seen this already in the Haskell course.] They can also depend indirectly on modules via some chain of importation, so that for instance M depends on M if M imports M and M imports M . The relation de
Manchester Knock London Dubin Paris
Edinburgh
Rome Madrid
Dene the relation R+ by a R+ b if and only if there is a trip from a to b. Then clearly a R+ b if and only if there is some path from a to b in the directed graph. For instance, there is a path fro
The equivalence classes of a set A can be represented by a Venn diagram: for example,
A2
A1 A
A3 A5 A4
In this case, there are ve equivalence classes, illustrated by the ve disjoint subsets. In fact, the equivalence classes always separate the elements in