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We show that the number of partitions of n with alternating sum k such that the multiplicity of each part is bounded by 2m+1 equals the number of partitions of n with k odd parts such that the multiplicity of each even part is bounded by m.…

组合数学 · 数学 2012-08-23 William Y. C. Chen , Ae Ja Yee , Albert J. W. Zhu

We present a dual of a family of partition identities of Andrews involving partitions with no repeated odd parts (among other conditions), along with an overpartition generalization that encapsulates both families. These were discovered…

组合数学 · 数学 2017-03-16 Shashank Kanade , Matthew C. Russell

Andrews and Keith recently produced a general Schmidt type partition theorem using a novel interpretation of Stockhofe's bijection, which they used to find new $q$-series identities. This includes an identity for a trivariate 2-colored…

组合数学 · 数学 2024-11-06 Hunter Waldron

Refined versions, analytic and combinatorial, are given for classical integer partition theorems. The examples include the Rogers-Ramanujan identities, the Gollnitz-Gordon identities, Euler's odd=distinct theorem, and the Andrews-Gordon…

组合数学 · 数学 2018-09-11 Kathleen O'Hara , Dennis Stanton

We generalize Brooks's theorem to show that if $G$ is a Borel graph on a standard Borel space $X$ of degree bounded by $d \geq 3$ which contains no $(d+1)$-cliques, then $G$ admits a $\mu$-measurable $d$-coloring with respect to any Borel…

逻辑 · 数学 2020-01-20 Clinton T. Conley , Andrew S. Marks , Robin Tucker-Drob

Various results ensure the existence of large complete bipartite graphs in properly colored graphs when some condition related to a topological lower bound on the chromatic number is satisfied. We generalize three theorems of this kind,…

组合数学 · 数学 2017-04-04 Meysam Alishahi , Hossein Hajiabolhassan , Frédéric Meunier

There is an extensive history of scholarship into what constitutes a "basic" color term, as well as a broadly attested acquisition sequence of basic color terms across many languages, as articulated in the seminal work of Berlin and Kay…

计算与语言 · 计算机科学 2019-10-04 Arya D. McCarthy , Winston Wu , Aaron Mueller , Bill Watson , David Yarowsky

We address partition regularity problems for homogeneous quadratic equations. A consequence of our main results is that, under natural conditions on the coefficients $a,b,c$, for any finite coloring of the positive integers, there exists a…

组合数学 · 数学 2024-08-08 Nikos Frantzikinakis , Oleksiy Klurman , Joel Moreira

We prove a better coloring theorem for aleph_4 and even aleph_3. This has a general topology consequence.

逻辑 · 数学 2019-01-29 Saharon Shelah

The Cyclic Coloring Conjecture asserts that the vertices of every plane graph with maximum face size D can be colored using at most 3D/2 colors in such a way that no face is incident with two vertices of the same color. The Cyclic Coloring…

组合数学 · 数学 2016-02-08 Michael Hebdige , Daniel Kral

The four-color theorem states that no more than four colors are required to color all nodes in planar graphs such that no two adjacent nodes are of the same color. The theorem was first propounded by Francis Guthrie in 1852. Since then,…

综合数学 · 数学 2019-05-02 Wei-Chang Yeh

In this paper, we give a conjecture, which generalises Euler's partition theorem involving odd parts and different parts for all moduli. We prove this conjecture for two family partitions. We give $q$-difference equations for the related…

组合数学 · 数学 2020-05-19 Xinhua Xiong , William J. Keith

In this paper, we present a new Rogers--Ramanujan type identity for overpartitions by extending the asymmetrical version of Schur's theorem due to Lovejoy to a broader class of infinite products. More precisely, we provide a combinatorial…

组合数学 · 数学 2025-10-02 Laure Velenik

Consider a graph $G$ with chromatic number $k$ and a collection of complete bipartite graphs, or bicliques, that cover the edges of $G$. We prove the following two results: \medskip \noindent $\bullet$ If the bicliques partition the edges…

组合数学 · 数学 2009-03-19 Dhruv Mubayi , Sundar Vishwanathan

For positive integers $k, l \geq 2$, the set of $k$-regular partitions in which parts appear at most $l$ times has attracted a lot of interest in that a composition of Glaisher's mapping can be used to prove the associated partition…

组合数学 · 数学 2023-10-31 Darlison Nyirenda , Molatelo Rapudi

A {\bf $\mathbf{k}$-majority coloring} of a digraph $D=(V,A)$ is a coloring of $V$ with $k$ colors so that each vertex $v\in V$ has at least as many out-neighbours of color different from its own color as it has out-neighbours with the same…

组合数学 · 数学 2025-08-27 Jørgen Bang-Jensen , Francois Pirot , Anders Yeo

Extending Sellers' result, Das et al. recently proved some congruence results for generalized overcubic partitions using theta functions and posed some related conjectures. In this paper, we provide a combinatorial proof of a result in…

数论 · 数学 2025-12-05 Suparno Ghoshal , Arijit Jana

This paper considers the problem of showing that every pair of binary trees with the same number of leaves parses a common word under a certain simple grammar. We enumerate the common parse words for several infinite families of tree pairs…

组合数学 · 数学 2014-04-18 Bobbe Cooper , Eric Rowland , Doron Zeilberger

This paper is the second in a series of planned papers which provide first bijective proofs of alternating sign matrix results. Based on the main result from the first paper, we construct a bijective proof of the enumeration formula for…

组合数学 · 数学 2019-12-04 Ilse Fischer , Matjaž Konvalinka

In a recent work, Andrews gave analytic proofs of two conjectures concerning some variations of two combinatorial identities between partitions of a positive integer into odd parts and partitions into distinct parts discovered by Beck.…

组合数学 · 数学 2018-10-09 Jane Y. X. Yang