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Recent activity by moe12leb
0
answers
1
derive a language from a grammar
{M ∈ {a,b}∗ | M contains at least three bs} {N ∈ {a,b}∗ | N has an odd length and a is in the middle always}
asked
in
Theory of Computation
Jan 21, 2023
256
views
theory-of-computation
regular-language
context-free-grammar
0
answers
2
PDA
i need to construct PDA for L = {a^m b^n: m>= n-5} L = {w belongs to {a,b}*: w has twice as many a’s as b’s}
asked
in
Theory of Computation
Jan 21, 2023
245
views
theory-of-computation
npda
1
answer
3
context free grammar
S→ aS | bS | epsilon what is the language generated by this grammar ?
asked
in
Theory of Computation
Jan 21, 2023
275
views
theory-of-computation
context-free-grammar
2
answers
4
context free grammar
what is the langauge generated by this grammar ? S-->aS | aSbS | ε what is the language
asked
in
Theory of Computation
Jan 21, 2023
276
views
theory-of-computation
context-free-language
context-free-grammar
0
answers
5
context free
Let $L = \{a^nb^nc^nd^n | n\ge1\}$. Show that $L$ can be expressed as the intersection of two context-free languages.
commented
in
Theory of Computation
Dec 4, 2022
329
views
theory-of-computation
context-free-language
1
answer
6
Context Free Grammar
Find context-free grammars for the following language The complement of the language L = belongs {a^n, b^n}
answer selected
in
Theory of Computation
Dec 3, 2022
342
views
theory-of-computation
context-free-grammar
0
answers
7
Context Free Grammar
Find context-free grammars for the following language L = { w : na(w) = 2nb(w); where w belongs {a, b}*}
asked
in
Theory of Computation
Nov 28, 2022
218
views
theory-of-computation
context-free-grammar
3
answers
8
theory regular langauge
Write a regular expression for all strings of 0’s and 1’s in which there is an even number of 0’s between any two 1’s.
asked
in
Theory of Computation
Nov 27, 2022
700
views
theory-of-computation
strings
regular-expression
0
answers
9
Theroy regular langauge
Write a regular expression for all strings of 0’s and 1’s in which at least one copy of the substring 01 occurs before any copy of the substring 10 occurs in the string. If there is no occurrence of the substring 10 then there need not be any copy of the substring 01.
asked
in
Theory of Computation
Nov 27, 2022
202
views
theory-of-computation
regular-expression
strings
1
answer
10
theory Regular Langauge
Write a regular expression for all strings of 0’s and 1’s in which the total number of zeros to the right of each 1 is even.
asked
in
Theory of Computation
Nov 27, 2022
241
views
theory-of-computation
strings
regular-expression
1
answer
11
Theory of Computation
b* a* ∩ a*b* = (a U b)* Is this statment wrong or correct ?
asked
in
Theory of Computation
Nov 5, 2022
309
views
theory-of-computation
regular-language
finite-automata
1
answer
12
Theory of Computation
does this string ‘baab’ belongs (ba)* U (ab)* ?
commented
in
Theory of Computation
Nov 4, 2022
347
views
theory-of-computation
regular-expression
strings
1
answer
13
theroy of computation
{ε}* , {ε} are these two expressions equal or different ? where ε is the empty string
asked
in
Theory of Computation
Nov 4, 2022
356
views
theory-of-computation
regular-expression
strings
1
answer
14
regular expressions
{(a* b)a } intersection {a*b*}, is this considered a regular language ? or not and how do i know ?
asked
in
Theory of Computation
Nov 2, 2022
307
views
theory-of-computation
regular-language
0
answers
15
theory of computuation
is λ the same as {λ}* ? are these expressions equal ?
asked
in
Theory of Computation
Nov 2, 2022
422
views
theory-of-computation
regular-expression
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