Questions tagged [combinatorics]

Combinatorics is the branch of computer science and math that focuses on the enumerable arrangements of a finite set. This includes permutations, combinations, and partitions.

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How do I create every permutation [closed]

I have a list of letters, this is just an example list: ['a','b','c','d','e'] How do I compute every combination of the list? The letters cannot repeat, for example. a,b,c,d,e a,c,b,d,e a,c,d,b,e a,...
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Domain analysis - why OFF points are inside of the domain when the border is open

I have asked on a few other sites, no response but it must be something silly as many authors mention in their books. Here is the best text I found: My ultimate question is: Why the OFF point lies ...
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Algorithm to create all unique sets of the alphabet using arbitrary group sizes

I'm looking for an algorithm to help me out with a combination of combinations problem. I have generated two lists of combinations of letters: (26 choose 6) & (26 choose 5) My goal is to be able ...
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Domain analysis for discrete values - ON and OFF points in these cases

Following my previous question (with great answer from Bart van Ingen Schenau), I noticed a discrepancy I could not wrap my head around: Bart mentioned that: The point ON the boundary is by ...