User Christian Sievers

14 votes

Why does every number of shape ababab is divisible by $13$?

answered Jun 7, 2016 at 15:51

7 votes

What is the exact difficulty in defining a point in Euclidean geometry?

answered Aug 9, 2016 at 10:52

5 votes

Accepted

GAP and Free group

answered May 11, 2016 at 13:33

5 votes

Maximum value of the smallest number of operations to obtain configuration from original configuration

answered Jun 1, 2016 at 23:21

5 votes

Accepted

Average number of strings with edit distance at most 4

answered Feb 1, 2020 at 3:47

4 votes

nonequivalence of category of Groups and category of Pointed Groups

answered Jun 18, 2016 at 23:26

3 votes

Count how many "free words" of a certain length reduce to the identity

answered May 24, 2016 at 14:45

3 votes

Reduced Words of Length $l$

answered May 28, 2016 at 15:03

3 votes

Number of 'unique' one bit binary functions with N-bit inputs

answered Jul 22, 2016 at 18:36

3 votes

Accepted

solve a specific word problem in free groups

answered Jul 8, 2016 at 15:36

3 votes

How many ways to get an odd number of each color in each bin?

answered Apr 14, 2018 at 23:29

2 votes

Greatest number of non-attacking moves that queens can make on an $n \times n$ chess board.

answered Oct 31, 2019 at 14:50

2 votes

Accepted

Help me understanding what actually i counted with inclusion-exclusion

answered Jul 20, 2016 at 18:12

2 votes

Accepted

When can $S \times S$ be partitioned by triples?

answered Aug 30, 2016 at 21:13

2 votes

Accepted

Probability 2 player card game with multiple patterns to win, who has the advantage?

answered Aug 22, 2016 at 2:46

2 votes

Accepted

Equation over free group

answered May 19, 2016 at 18:03

2 votes

Accepted

Identify inherently ambiguous languages

answered Jun 12, 2016 at 21:52

1 vote

Finding a pattern regarding perfect cubes.

answered Jul 6, 2016 at 21:25

1 vote

Decreasing sequence numbers with first digit $9$

answered Jul 6, 2016 at 23:32

1 vote

Is this a regular language ? SubString(L1, L2) = {w | ∃x, y ∈ L1, xwy ∈ L2}

answered Jul 26, 2016 at 20:59

0 votes

Simulating a fair coin with 2 special fair coins

answered Jul 8, 2016 at 17:45

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21 Answers

Why does every number of shape ababab is divisible by $13$?

What is the exact difficulty in defining a point in Euclidean geometry?

GAP and Free group

Maximum value of the smallest number of operations to obtain configuration from original configuration

Average number of strings with edit distance at most 4

nonequivalence of category of Groups and category of Pointed Groups

Count how many "free words" of a certain length reduce to the identity

Reduced Words of Length $l$

Number of 'unique' one bit binary functions with N-bit inputs

solve a specific word problem in free groups

How many ways to get an odd number of each color in each bin?

Greatest number of non-attacking moves that queens can make on an $n \times n$ chess board.

Help me understanding what actually i counted with inclusion-exclusion

When can $S \times S$ be partitioned by triples?

Probability 2 player card game with multiple patterns to win, who has the advantage?

Equation over free group

Identify inherently ambiguous languages

Finding a pattern regarding perfect cubes.

Decreasing sequence numbers with first digit $9$

Is this a regular language ? SubString(L1, L2) = {w | ∃x, y ∈ L1, xwy ∈ L2}

Simulating a fair coin with 2 special fair coins