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Results tagged with co.combinatorics
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user 7923
Enumerative combinatorics, graph theory, order theory, posets, matroids, designs and other discrete structures. It also includes algebraic, analytic and probabilistic combinatorics.
0
votes
0
answers
281
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12 and 13-bit balanced Gray codes
I am trying to find a transition sequence for both 12 and 13 bit balanced Gray codes. I know there are some excellent papers on the topic of deriving these sequences available on the internet, but I r …
- 425
8
votes
2
answers
631
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Integer strings such as: 4,1,1,3,4,2,3,2
I'm working on a project that uses strings of integers with the property that the numbers 1 though N are each used twice such that each pair of numbers X are X spaces apart.
For example, in the strin …
- 425
2
votes
0
answers
90
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Skolem sequence of quadrupets?
I recently read that there are solutions for Langford sequences of quadruplets (four of each number evenly spaced) when n=24.
I'm curious if anyone has found Skolem sequences of quadruplets?
Many than …
- 425
14
votes
3
answers
2k
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String of integers puzzle
I apologize for not have the math background to put this question in a more formal way.
I'm looking to create a string of 796 letters (or integers) with certain properties.
Basically, the string is …
- 425