نتایج جستجو برای: riordan group

تعداد نتایج: 979862  

Journal: :Linear Algebra and its Applications 2013

Journal: :Journal of Algebraic Combinatorics 2021

Journal: :Linear Algebra and its Applications 2017

2006
T. DASBACH DAVID FUTER EFSTRATIA KALFAGIANNI XIAO - SONG LIN

The Jones polynomial of an alternating link is a certain specialization of the Tutte polynomial of the (planar) checkerboard graph associated to an alternating projection of the link. The Bollobás–Riordan–Tutte polynomial generalizes the Tutte polynomial of planar graphs to graphs that are embedded in closed surfaces of higher genus (i.e. dessins d'enfant). In this paper we show that the Jones ...

Journal: :Combinatorics, Probability & Computing 2006
Joanna A. Ellis-Monaghan Lorenzo Traldi

We generalize and unify results on parametrized and coloured Tutte polynomials of graphs and matroids due to Zaslavsky, and Bollobás and Riordan. We give a generalized Zaslavsky– Bollobás–Riordan theorem that characterizes parametrized contraction–deletion functions on minor-closed classes of matroids, as well as the modifications necessary to apply the discussion to classes of graphs. In gener...

2008
Alexander D. Scott Alan D. Sokal Pierre Leroux ALAN D. SOKAL

We prove some variants of the exponential formula and apply them to the multivariate Tutte polynomials (also known as Potts-model partition functions) of graphs. We also prove some further identities for the multivariate Tutte polynomial, which generalize an identity for counting connected graphs found by Riordan, Nijenhuis, Wilf and Kreweras and in more general form by Leroux and Gessel, and a...

Journal: :J. Comb. Theory, Ser. B 2008
Oliver T. Dasbach David Futer Efstratia Kalfagianni Xiao-Song Lin Neal W. Stoltzfus

The Jones polynomial of an alternating link is a certain specialization of the Tutte polynomial of the (planar) checkerboard graph associated to an alternating projection of the link. The Bollobás–Riordan– Tutte polynomial generalizes the Tutte polynomial of graphs to graphs that are embedded in closed oriented surfaces of higher genus. In this paper we show that the Jones polynomial of any lin...

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