Questions tagged [permutation]
For questions about the functionality related to permutations in Mathematica.
273
questions
3
votes
1
answer
91
views
Sort the arguments of a function using replace
I want to sort the arguments of a function f while multiplying with the signature of the permutation, i.e. f is totally antisymmetric function. My idea was something like
...
- 239k
6
votes
6
answers
265
views
How to efficiently find all element combination including a certain element in the list
I have the following list :
alist={{5, 6, 7}, {7, 6, 8}, {5, 7, 25}, {7, 8, 26}, {7, 26, 25}, {5, 4, 6}, {4, 12, 6}, {6, 12, 13}, {6, 13, 8}}
I want to find all ...
- 27.8k
1
vote
1
answer
99
views
Can I improve my code to extract permutation cycles from a (n,2) matrix?
I've written a routine to extract permutation cycles from a (n,2) matrix, each row giving the format $a\to b$ which represents the first two elements in some $k$ cycle. If $a\to a$, it's a $1$-cycle. ...
- 53.7k
2
votes
2
answers
368
views
Group table for permutation group
I have got a permutation group:
$(\{(e,((1, 4),(2,6),(3,5)),((1, 6),(2,5),(3,4)),((1, 5),(2,4),(3,6)),((1, 3,2),(4,6,5)),((1,2,3),(4,5,6)),((1, 4),(2,5),(3,6)),((1, 3),(4,6)),((2, 3),(5,6)),((1, 2),(...
- 1,460
2
votes
5
answers
82
views
Generate a list of the product of combinated terms in groups of 2
Here is what I have:
j1=2
Do[Print[w[m1, n1] =
ToExpression["w" <> ToString[m1] <> ToString[n1]]], {m1, 1,
j1}, {n1, 1, j1}]
That's what I got:...
- 27.8k
12
votes
5
answers
420
views
StringContainsQ, but anywhere in order
I am trying to find a string within a string, but "anywhere", so long as it is in the right order.
For example
StringContainsQ["aabbc","ac"]
returns
...
- 27.8k
8
votes
6
answers
299
views
Construct a list from another list
Given a list, lst, of length 2n, I want to construct a new one that results from the exchange of the fist half of lst with the ...
- 27.8k
9
votes
9
answers
932
views
Shuffling two lists into each other
Given a subset s of Range[n] and two lists a and b, with ...
- 81.5k
7
votes
9
answers
614
views
Rearrange triple sublists
Given a set of triple lists (all contain element 9!)
tripel = {{5, 10, 9}, {4, 9, 3}, {3, 9, 8}, {4, 5, 9}, {9, 10, 8}}
I would ...
- 191
5
votes
1
answer
161
views
Find permutation that satisfies conditions
Suppose you what to find a permutation of integers {1, 2, ..., 13} that satisfy some rules.
Rules can be found in variable rules....
- 20.1k
5
votes
6
answers
694
views
String permutation
I have a string "abcd". Is there any way in Mathematica such that when I apply some exchange operator $P^{ab}$ it gives me string "bacd"?
Edit:
After reading answers I felt like I ...
- 81.5k
2
votes
1
answer
94
views
Pattern Matching and Permutations
I am working with some math students on some problems involving permutations. My Mathematica knowledge is limited and I'm hoping to get some help. Two sample problems:
a)how many ways can the ...
- 27.7k
1
vote
1
answer
93
views
Elements of a group that send one element to another
If I have a permutation group, say $S_{10}$, how do I get all the permutations that send the set {1, 2, 3} to {5, 6, 7}? I know ...
CommunityBot
- 1
17
votes
12
answers
4k
views
Fastest way to generate {{a,a},{a,b},{a,c},{b,b},{b,c},{c,c}} from {a,b,c}
What is the fastest way to generate {{a,a},{a,b},{a,c},{b,b},{b,c},{c,c}} from l={a,b,c}? I've tried
...
- 81.5k
1
vote
2
answers
118
views
How to determine if two colorings of a graph are the same?
A coloring of a graph $G$ with vertex set $V$ is the partitioning of $V$ into so-called color classes so that no two vertices of the same class are adjacent. A $k$-coloring contains exactly $k$ color ...
- 236k