a variable a in a context free grammar g is persistent if it appears in every derivation of ever

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Chris Trentman · Answer

we are given two context -free grammars which generate two languages l of g one and l of g two a

Adriano Chikande · Answer

In this question we have been told that G is a grammar and lambda is a null string. So we are go

Supreeta N · Answer

Hi, here the last symbol of string is C. So any string in M can be written as W equal to X, C, Y

Adriano Chikande · Answer

The first thing that we want to do in this question is to rewrite the given statements in form o

Adriano Chikande · Answer

To answer this question, we&#x27;re going to be applying the definition approach, where we look at th

A variable A in a Context Free Grammar, G, is persistent if it appears in every derivation of every string w in G. Given a Context Free Grammar, G and a variable A, consider the problem of testing whether A is persistent. Formulate this problem as a language and show that it is decidable.