Mathematics - Posts tagged combinatorics

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Q&A Without trial and error, how can I effortlessly deduce all $n, k_i ∈ ℕ ∋ \binom n {k_1, k_2, ..., k_n} =$ given c?

1 answer · posted 1y ago by Chgg Clou‭ · edited 8mo ago by Michael Hardy‭

Question combinatorics

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Q&A Is there a $(n_3)$ configuration which is not self-dual?

1 answer · posted 1y ago by WheatWizard‭ · last activity 1y ago by Peter Taylor‭

Question combinatorics

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Q&A organizing a library

1 answer · posted 2y ago by msh210‭ · last activity 2y ago by celtschk‭

Question combinatorics recreational-mathematics

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Q&A Do the Faber partition polynomials have integer coefficients?

1 answer · posted 2y ago by Peter Taylor‭ · last activity 2y ago by Peter Taylor‭

Question combinatorics generating-functions polynomials

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Q&A How to intuit, construe multiplicands and multiplicators $\le 10$ resulting from $\dbinom pc$, WITHOUT division or factorials? [duplicate]

0 answers · posted 3y ago by DNB‭ · edited 3y ago by DNB‭

Question combinatorics

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Q&A To correct for overcounting, why can't we divide by the sum of the over-counts? [duplicate]

0 answers · posted 3y ago by DNB‭ · closed as duplicate 3y ago by Peter Taylor‭

Question combinatorics

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Q&A How's it possible to arrange 0 objects? How can 0! = 1?

3 answers · posted 3y ago by DNB‭ · edited 3y ago by Quintec‭

Question combinatorics

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Q&A Can the bijection for the Lost Boarding Pass Probability Problem, be formulated or pictured?

1 answer · posted 3y ago by DNB‭ · last activity 3y ago by r~~‭

Question combinatorics

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Q&A What does the distribution of a strictly increasing random walk look like if you stop at `N` steps?

0 answers · posted 3y ago by SherlockSage‭ · edited 3y ago by SherlockSage‭

Question combinatorics

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

1 answer · posted 3y ago by DNB‭ · edited 3y 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 · posted 3y 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 · posted 3y ago by DNB‭

Question combinatorics

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Posts tagged combinatorics