Search Results - "Brunat, Josep M."
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1
Satins, lattices, and extended Euclid's algorithm
Published in Japan journal of industrial and applied mathematics (01-01-2022)“…Motivated by the design of satins with draft of period m and step a , we draw our attention to the lattices L ( m , a ) = ⟨ ( 1 , a ) , ( 0 , m ) ⟩ where 1 ≤…”
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Extreme Weights in Steinhaus Triangles
Published in Electronic notes in discrete mathematics (01-10-2016)“…Let {0=w0<w1<w2<…<wm} be the set of weights of binary Steinhaus triangles of size n, and let Wi be the set of sequences in F2n that generate triangles of…”
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3
On polynomial digraphs
Published in Discrete mathematics (06-03-2006)“…Let Φ ( x , y ) be a bivariate polynomial with complex coefficients. The zeroes of Φ ( x , y ) are given a combinatorial structure by considering them as arcs…”
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On endo-Cayley digraphs: The hamiltonian property
Published in Discrete mathematics (28-08-2005)“…Given a finite abelian group A, a subset Δ ⊆ A and an endomorphism φ of A, the endo-Cayley digraph G A ( φ , Δ ) is defined by taking A as the vertex set and…”
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5
Chromatic Automorphisms of Consecutive Digraphs
Published in Graphs and combinatorics (01-06-2003)“…Let 1 less than or equal to d less than or equal to n be two positive integers, e,h,c belongs to Zn, and assume that the set delta={e,e+h,...,e+(d-1)h} subset…”
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Computing the Canonical Representation of Constructible Sets
Published in Mathematics in computer science (01-03-2016)“…Constructible sets are needed in many algorithms of Computer Algebra, particularly in the Gröbner Cover and other algorithms for parametric polynomial systems…”
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Periodicity of power Fibonacci sequences modulus a Fibonacci number
Published 01-04-2022“…Let ${\mathcal F}=(F_i:i\ge 0)$ be the sequence of Fibonacci numbers, and $j$ and $e$ be non negative integers. We study the periodicity of the power Fibonacci…”
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A polynomial generalization of the power-compositions determinant
Published in Linear & multilinear algebra (01-07-2007)“…Let C(n, p) be the set of p-compositions of an integer n, i.e., the set of p-tuples α=(α 1 ,... ,α p ) of nonnegative integers such that α 1 +··· +α p =n, and…”
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A problem on concatenated integers
Published 09-03-2021“…Motivated by a WhattsApp message, we find out the integers $x> y\ge 1$ such that $(x+1)/(y+1)=(x\circ(y+1))/(y\circ (x+1))$, where $\circ$ means the…”
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10
Partitions of a finite Boolean lattice into intervals
Published in European journal of combinatorics (01-11-2009)“…Related to activities in matroids, J.E. Dawson introduced a construction that leads to partitions of the Boolean lattice of parts of a set into intervals. In…”
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11
Steinhaus Triangles Generated by Vectors of the Canonical Bases
Published 21-07-2017“…We give a method to calculate the weight of binary Steinhaus triangles generated by the vectors of the canonical basis of the vector space $\mathbb{F}_2^n$…”
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12
Small and Large Weights in Steinhaus Triangles
Published 19-07-2017“…Let $\{0=w_0<w_1<w_2<\ldots<w_m\}$ be the set of weights of binary Steinhaus triangles of size $n$, and let $W_i$ be the set of sequences in $\mathbb{F}_2^n$…”
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13
A polynomial generalization of the power-compositions determinant
Published 31-01-2006“…Let $C(n,p)$ be the set of $p$-compositions of an integer $n$, i.e., the set of $p$-tuples $\bm{\alpha}=(\alpha_1,...,\alpha_p)$ of nonnegative integers such…”
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14
The characteristic ideal of a finite, connected, regular graph
Published 30-01-2006“…Proc. ISSAC-2004, ACM, 50-57 Let $\Phi(x,y)\in\mathbb{C}[x,y]$ be a symmetric polynomial of partial degree $d$. The graph $G(\Phi)$ is defined by taking…”
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15
On polynomial digraphs
Published 30-01-2006“…Discrete Math. (2006), 306/4, p 401-412 Let $\Phi(x,y)$ be a bivariate polynomial with complex coefficients. The zeroes of $\Phi(x,y)$ are given a…”
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16
Shaping Communities out of Triangles
Published 26-07-2012“…Community detection has arisen as one of the most relevant topics in the field of graph data mining due to its importance in many fields such as biology,…”
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