a) Let S be the set of subroutines of a computer program.
Chapter 12, Problem 16E(choose chapter or problem)
a) Let S be the set of subroutines of a computer program. Define the relation R by PR Q if subroutine P calls subroutine Q during its execution. Describe the transitive closure of R.________________b) For which subroutines P does (P, P) belong to the transitive closure of R?________________c) Describe the reflexive closure of the transitive closure of R.
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