Peter Linz Edition 4 Exercise 6.1 Question 14 (Page No. 162)

Question

Suppose that $G$ is a context-free grammar for which $λ ∈ L (G)$. Show that if we apply the
construction in Theorem 6.3, we obtain a new grammar $\widehat{G}$ such that $L(\widehat{G} ) = L (G) –$ {$λ$}.