Let G be the grammar with V = { a , b , c , S } ; T = { a , b , c } ; starting symbol S ; and productions S → a b S , S → b c S , S → b b S , S → a and S → c b . Construct derivation trees for a) b c b b a . b) b b b c b b a . c) b c a b b b b b c b .
Let G be the grammar with V = { a , b , c , S } ; T = { a , b , c } ; starting symbol S ; and productions S → a b S , S → b c S , S → b b S , S → a and S → c b . Construct derivation trees for a) b c b b a . b) b b b c b b a . c) b c a b b b b b c b .
Let G be the grammar with
V
=
{
a
,
b
,
c
,
S
}
;
T
=
{
a
,
b
,
c
}
; starting symbol S; and productions
S
→
a
b
S
,
S
→
b
c
S
,
S
→
b
b
S
,
S
→
a
and
S
→
c
b
. Construct derivation trees for
Let A = {a, b, c, d, e, f}, and let G and H be the following equivalence
%3|
relations in A:
G = IAU{(a,b), (b, a) , (b, c) , (c, b) , (a, c) , (c, a) , (d, e), (e, d)} ,
H = IAU{(b, c) , (c, b)} .
%3D
Clearly, H is a refinement of G. Exhibit the sets A/G, A/H, G/H,
(A/H)/(G/H).
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