Results 21 to 30 of about 110,794 (282)

The spectra of polynomial equations with varying exponents [PDF]

open access: yes, 2014
We study the dependence of solutions of equations of the form $a_0 + a_1 z^{\ell_1} + ... + a_m z^{\ell_m} = 0$, on the exponents $\ell_1, ..., \ell_m$.
Hadari, Asaf
core   +1 more source

Polynomial Invariants of Graphs [PDF]

open access: yesTransactions of the American Mathematical Society, 1987
We define two polynomials f ( G ) f(G) and f ∗ ( G ) {f^{\ast }}(G) for a graph G G by a recursive formula with respect to deformation of graphs.
openaire   +2 more sources

On fully split lacunary polynomials in finite fields [PDF]

open access: yes, 2011
We estimate the number of possible types degree patterns of $k$-lacunary polynomials of degree $t < p$ which split completely modulo $p$. The result is based on a combination of a bound on the number of zeros of lacunary polynomials with some graph ...
Bibak, Khodakhast, Shparlinski, Igor E.
core   +1 more source

Graph Polynomials

open access: yesISRN Algebra, 2011
One of the most important and applied concepts in graph theory is to find the edge cover, vertex cover, and dominating sets with minimum cardinal also to find independence and matching sets with maximum cardinal and their polynomials. Although there exist some algorithms for finding some of them (Kuhn and Wattenhofer, 2003; and Mihelic and Robic, 2005),
Mehdi Alaeiyan, Saeid Mohammadian
openaire   +1 more source

Polynomial hulls of graphs [PDF]

open access: yesPacific Journal of Mathematics, 1991
We consider the polynomially convex hull of the graph of a continuous complex-valued function on the boundary of the unit ball. We show first that the hull covers the closed unit ball and then consider several of its properties. In particular, when is the hull also a graph; i.e. single sheeted?
openaire   +3 more sources

A bivariate chromatic polynomial for signed graphs [PDF]

open access: yes, 2014
We study Dohmen--P\"onitz--Tittmann's bivariate chromatic polynomial $c_\Gamma(k,l)$ which counts all $(k+l)$-colorings of a graph $\Gamma$ such that adjacent vertices get different colors if they are $\le k$.
Beck, Matthias, Hardin, Mela
core   +1 more source

RC-Graphs and Schubert Polynomials [PDF]

open access: yesExperimental Mathematics, 1993
Using a formula of Billey, Jockusch and Stanley, Fomin and Kirillov have introduced a new set of diagrams that encode the Schubert polynomials. We call these objects rc-graphs. We define and prove two variants of an algorithm for constructing the set of all rc-graphs for a given permutation.
Bergeron, Nantel, Billey, Sara
openaire   +2 more sources

On coefficients of circuit polynomials and characteristic polynomials

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1985
Results are given from which expressions for the coefficients of the simple circuit polynomial of a graph can be obtained in terms of subgraphs of the graph. From these are deduced parallel results for the coefficients of the characteristic polynomial of
E. J. Farrell
doaj   +1 more source

A novel approach for the system of coupled differential equations using clique polynomials of graph

open access: yesPartial Differential Equations in Applied Mathematics, 2022
This study proposed an efficient numerical technique for coupled differential equations (CDEs) using the clique polynomials of the Complete graph. Recently, Graph theory has dragged the attention of many mathematicians due to its wide applications. Here,
Kumbinarasaiah S., Manohara G.
doaj   +1 more source

Topological invariants for the line graphs of some classes of graphs

open access: yesOpen Chemistry, 2019
Graph theory plays important roles in the fields of electronic and electrical engineering. For example, it is critical in signal processing, networking, communication theory, and many other important topics.
Zhou Xiaoqing   +5 more
doaj   +1 more source

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