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Michael Sipser Edition 3 Exercise 2 Question 52 (Page No. 159)
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Show that every DCFG generates a prefix-free language.
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Michael Sipser Edition 3 Exercise 2 Question 51 (Page No. 159)
Show that every DCFG is an unambiguous CFG.
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Michael Sipser Edition 3 Exercise 1 Question 40 (Page No. 89)
Recall that string $x$ is a $\text{prefix}$ of string $y$ if a string $z$ exists where $xz = y,$ and that $x$ is a $\text{proper prefix}$ of $y$ if in addition $x\neq y.$ In each of the following parts, we define an operation on a ... $\text{NOEXTEND(A) = {w ∈ A| w is not the proper prefix of any string in A}.}$
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Oct 17, 2019
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Michael Sipser Edition 3 Exercise 5 Question 2 (Page No. 239)
Show that $EQ_{CFG}$ is co-Turing-recognizable.
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Oct 17, 2019
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Michael Sipser Edition 3 Exercise 2 Question 46 (Page No. 158)
Consider the following CFG $G:$ $S \rightarrow SS \mid T$ $T \rightarrow aT b \mid ab$ Describe $L(G)$ and show that $G$ is ambiguous. Give an unambiguous grammar $H$ where $L(H) = L(G)$ and sketch a proof that $H$ is unambiguous.
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