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Results tagged with combinatorics
Search options questions only
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user 92
Questions related to combinatorics and discrete mathematical structures
21
votes
1
answer
587
views
Does every large enough string have repeats?
Let $\Sigma$ be some finite set of characters of fixed size. Let $\alpha$ be some string over $\Sigma$. We say that a nonempty substring $\beta$ of $\alpha$ is a repeat if $\beta = \gamma \gamma$ for …
- 9,156
17
votes
3
answers
1k
views
Number of words in the regular language $(00)^*$
According to Wikipedia, for any regular language $L$ there exist constants $\lambda_1,\ldots,\lambda_k$ and polynomials $p_1(x),\ldots,p_k(x)$ such that for every $n$ the number $s_L(n)$ of words of l …
- 9,156