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Posts tagged combinatorics

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3 posts
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Q&A $\sum_{k=0}^{n} \binom{n}{k}=2^{n} \overset{?}{\iff} \sum_{k=0}^{n} \binom{2n+1}{k}=2^{2n}$

1 answer  ·  last activity 7 days ago by DNB‭

Question combinatorics
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Q&A What's the bijection between Stars and Bars and Integer Solutions to an Equality?

0 answers  ·  last activity 15 days ago by DNB‭

Question combinatorics
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Q&A Are Stars and Bars in Combinatorics related to the Fence Post Error?

0 answers  ·  last activity 15 days ago by DNB‭

Question combinatorics
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Q&A — $\sum_{k=0}^{n} \binom{n}{k}=2^{n} \overset{?}{\iff} \sum_{k=0}^{n} \binom{2n+1}{k}=2^{2n}$

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