List questions from regular-expressions

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Constructing grammar for $a^ib^j$ / $i\neq j$

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Solution Verification: Regular expression that starts with $a$ and doesn't contain $aba$ pattern.

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Regular Expression for binary string that contains number of zeros not a multiple of 3

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Finding the equivalent regex for a formal grammar

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creating regular expressions from given language

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Regular Expression - binary digits, no occurrences of 111, solving methodology?

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773

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Prove that $L=\{a^n b^l : n \leq l\}$ is not regular by pumping lemma

Published on 25 Mar 2026 - 21:48

110

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Finding equivalence class for $R_L$ of a regular language

Published on 24 Apr 2022 - 21:29

63

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Build a regular expression that specifies the language L in the alphabet Σ = {a, b, c}:

Published on 26 May 2022 - 9:51

38

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Prove formal language isn't regular

Published on 14 Jul 2022 - 14:17

29

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Substitution of a letter with a regular expressions in regular expressions identities

Published on 03 Aug 2022 - 7:12

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What happens if I expand b( (ab) b )*?

Published on 22 Aug 2022 - 14:08

59

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Can a binomial be a term?

Published on 15 Sep 2022 - 0:44

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Unambiguous regular expression for binary strings

Published on 21 Oct 2022 - 16:53

List Question

a^m b^n c^n prove it's not regular/pumping lemma

Constructing grammar for $a^ib^j$ / $i\neq j$

Solution Verification: Regular expression that starts with $a$ and doesn't contain $aba$ pattern.

Regular Expression for binary string that contains number of zeros not a multiple of 3

Finding the equivalent regex for a formal grammar

creating regular expressions from given language

Regular Expression - binary digits, no occurrences of 111, solving methodology?

Prove that $L=\{a^n b^l : n \leq l\}$ is not regular by pumping lemma

Finding equivalence class for $R_L$ of a regular language

Build a regular expression that specifies the language L in the alphabet Σ = {a, b, c}:

Prove formal language isn't regular

Substitution of a letter with a regular expressions in regular expressions identities

What happens if I expand b( (ab) b )*?

Can a binomial be a term?

Unambiguous regular expression for binary strings

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