User Peter Taylor

8 votes

Why are functional languages Turing complete?

answered Jul 11, 2015 at 18:36

8 votes

Why do DFAs with a single final state have less power?

answered Dec 6, 2018 at 13:45

7 votes

Accepted

Is De Bruijn Graph Hyper-cube?

answered Jul 2, 2018 at 14:14

6 votes

Accepted

Union of a regular and a non-regular language

answered Feb 22, 2019 at 8:42

6 votes

Why is English not a regular language?

answered Oct 23, 2019 at 13:28

5 votes

How can I determine if two vertices on a polygon are consecutive?

answered Oct 20, 2019 at 22:19

4 votes

How to devise an algorithm to generate a random but valid train track layout?

answered Dec 5, 2019 at 11:30

4 votes

Is there a solution set for Knuth's The Art of Computer Programming series?

answered Aug 1, 2019 at 14:09

4 votes

Accepted

Algorithm Design: Efficient O(n) algorithm to get the ith to jth largest elements in an array

answered Sep 17, 2019 at 6:38

4 votes

Shortest path when allowed to reverse an edge

answered Oct 10, 2018 at 11:23

3 votes

Can we prove using pumping lemma that language F = {$a^ i b ^j c ^k$ | i, j, k ≥ 0 and if i = 1 then j = k} is not regular?

answered Sep 18, 2018 at 14:20

3 votes

Accepted

If you have a smallest grammar approximation, do you immediately have a CFG inference algorithm?

answered Jan 11, 2019 at 9:47

3 votes

Planar embeddings of planar graph

answered Jun 25, 2018 at 13:36

3 votes

Searching and inserting in $O(n)$ when $n$ is the size of the key

answered Aug 27, 2018 at 8:12

3 votes

Necessity of convolution operations for product of two polynomials via brute force method

answered Feb 3, 2018 at 11:11

3 votes

Enumerate partitions of a set with blocks of equal size

answered Feb 5, 2018 at 13:08

3 votes

Trying to verify the solution to a lambda calculus equation

answered Mar 11, 2018 at 7:50

3 votes

Accepted

An algorithm for k-way array partitioning

answered Mar 22, 2018 at 15:12

3 votes

Why haven't I solved the Travelling Salesman problem with the following argument using djikstras algorithm?

answered Sep 18, 2019 at 5:40

3 votes

Myhill-Nerode equivalence classes of $\{1^n0^n\}$

answered Jan 30, 2019 at 11:42

3 votes

Find a language $L$, such that $L \notin \mathbf{P}$, but $L^* \in \mathbf{P}$

answered Feb 18, 2019 at 17:32

3 votes

Proof that (x-y)(x+y) is more accurate than x²-y²

answered Apr 1, 2019 at 6:25

2 votes

Convex Hull on a Spherical Surface

answered Apr 17, 2019 at 13:19

2 votes

Accepted

Indexing Edge Permutations for the Rubik's Cube

answered Apr 18, 2019 at 6:58

2 votes

O(B) algorithm to find positions of all permutations of smaller string in a bigger string with length B - how is this possible?

answered Mar 14, 2019 at 7:57

2 votes

Is the calculation of infinite sums solvable by a computer?

answered Jul 31, 2019 at 6:54

2 votes

Algorithm for the complete parenthesization of n factors

answered Aug 20, 2019 at 13:26

2 votes

Efficiently generating a prime polynomial of a given degree

answered Mar 8, 2018 at 8:36

2 votes

Encoding (binary) trees using lambda calculus

answered Sep 3, 2018 at 17:38

2 votes

Optimizing coin splitting - Is this algorithm as fast as I think?

answered Sep 8, 2018 at 7:27

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72 Answers

Why are functional languages Turing complete?

Why do DFAs with a single final state have less power?

Is De Bruijn Graph Hyper-cube?

Union of a regular and a non-regular language

Why is English not a regular language?

How can I determine if two vertices on a polygon are consecutive?

How to devise an algorithm to generate a random but valid train track layout?

Is there a solution set for Knuth's The Art of Computer Programming series?

Algorithm Design: Efficient O(n) algorithm to get the ith to jth largest elements in an array

Shortest path when allowed to reverse an edge

Can we prove using pumping lemma that language F = {$a^ i b ^j c ^k$ | i, j, k ≥ 0 and if i = 1 then j = k} is not regular?

If you have a smallest grammar approximation, do you immediately have a CFG inference algorithm?

Planar embeddings of planar graph

Searching and inserting in $O(n)$ when $n$ is the size of the key

Necessity of convolution operations for product of two polynomials via brute force method

Enumerate partitions of a set with blocks of equal size

Trying to verify the solution to a lambda calculus equation

An algorithm for k-way array partitioning

Why haven't I solved the Travelling Salesman problem with the following argument using djikstras algorithm?

Myhill-Nerode equivalence classes of $\{1^n0^n\}$

Find a language $L$, such that $L \notin \mathbf{P}$, but $L^* \in \mathbf{P}$

Proof that (x-y)(x+y) is more accurate than x²-y²

Convex Hull on a Spherical Surface

Indexing Edge Permutations for the Rubik's Cube

O(B) algorithm to find positions of all permutations of smaller string in a bigger string with length B - how is this possible?

Is the calculation of infinite sums solvable by a computer?

Algorithm for the complete parenthesization of n factors

Efficiently generating a prime polynomial of a given degree

Encoding (binary) trees using lambda calculus

Optimizing coin splitting - Is this algorithm as fast as I think?