Question

Conversions to CNF:

Textbook problems: 7.1.1 - 7.1.4 (p. 275)

7.1.1) Find a grammar equivalent to the following, but with no useless symbols:
S → AB | CA
A → a
B → BC | AB
C → aB | b

7.1.2) Begin with the following grammar, then eliminate ε-productions, eliminate unit productions, eliminate useless symbols, then put the grammar into CNF.
S → ASB | ε
A → aAS | a
B → SbS | A | bb

7.1.3) As in 7.1.2, convert the following grammar to CNF:
S → 0A0 | 1B1 | BB
A → C
B → S | A
C → S | ε

7.1.4) Put this grammar into CNF:
S → AAA | B
A → aA | B
B → ε

From a previous exam, put this into CNF:
S → BA | bSa
A → B | aB
B → A | ε

Answer 1

7.11. SABICA یہ ہے A Il useless. B BC AB сав)ь Remove Useless Production Now evrammer! SCA 2 Ata c b. - this is without any useless Production

7.13 5 → ASBE A → QA5) e B→ Sosial bb © Remove unit Productions, E-Null Productions By Al Ba AS a @ Eliminate useless Production n SA SB angla QAsla sbglaAs/albb sy ASBE Ata Asla By Sosla Aslal bb @ Convent into (NF Bubb B'→ USB565 Buse's B + BB! |B" ~ SBI ( BB's

BaAS LA'sa B ALAS All AA BA"S A+"S S ASB I s AS 5-→ S'B 7 (NF Equivalent to crammer is :- s s'ble s! → AS A > Als la All → ANA A ta BB"s | A's/a/8'b' 819 75B! B' b