Results 51 to 60 of about 495,855 (310)

Periodic stationary solutions of the Nagumo lattice differential equation: existence regions and their number

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
The Nagumo lattice differential equation admits stationary solutions with arbitrary spatial period for sufficiently small diffusion rate. The continuation from the stationary solutions of the decoupled system (a system of isolated nodes) is used to ...
Vladimir Švígler
doaj   +1 more source

Counting quadrant walks via Tutte's invariant method (extended abstract) [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2020
Extended abstract presented at the conference FPSAC 2016, Vancouver.
Olivier Bernardi   +2 more
doaj   +1 more source

Enumeration of cospectral graphs [PDF]

open access: yesEuropean Journal of Combinatorics, 2004
AbstractWe have enumerated all graphs on at most 11 vertices and determined their spectra with respect to various matrices, such as the adjacency matrix and the Laplacian matrix. We have also counted the numbers for which there is at least one other graph with the same spectrum (a cospectral mate).
Haemers, W.H., Spence, E.
openaire   +5 more sources

A Schur function identity related to the (-1)-enumeration of self-complementary plane partitions [PDF]

open access: yes, 2006
We give another proof for the (-1)-enumeration of self-complementary plane partitions with at least one odd side-length by specializing a certain Schur function identity. The proof is analogous to Stanley's proof for the ordinary enumeration. In addition,
Eisenkölbl, Theresia
core   +3 more sources

Enumeration of points, lines, planes, etc [PDF]

open access: yes, 2016
One of the earliest results in enumerative combinatorial geometry is the following theorem of de Bruijn and Erdős: Every set of points $E$ in a projective plane determines at least $|E|$ lines, unless all the points are contained in a line.
June Huh, Botong Wang
semanticscholar   +1 more source

Comparative Enumeration Gene Expression [PDF]

open access: yes, 2008
This paper is about differential gene expression measured by transcript counting methods such as SAGE or MPSS. It introduces two significance tests for detection of differential expressed tags: frequentist and Bayesian. Under the frequentist view, it is
Carlos A. D. E. B. Pereira   +1 more
core   +2 more sources

Enumeration of mosaics [PDF]

open access: yesDiscrete Mathematics, 1999
AbstractMosaics are orbits of partitions arising from music theoretical investigations. Various theorems from the field of ‘enumeration under finite group actions’ are applied for enumerating mosaics. In other words, it is demonstrated how to enumerate G-orbits of partitions of given size, block-type or stabilizer-type.
openaire   +1 more source

Bimonotone enumeration [PDF]

open access: yesMathematics of Computation, 2009
Solutions of a diophantine equation $f(a,b) = g(c,d)$, with $a,b,c,d$ in some finite range, can be efficiently enumerated by sorting the values of $f$ and $g$ in ascending order and searching for collisions. This article considers functions that are bimonotone in the sense that $f(a,b) \le f(a',b')$ whenever $a \le a'$ and $b \le b'$.
openaire   +3 more sources

Enumerating Hamiltonian Cycles in a Planar Graph Using Combinatorial Cycle Bases

open access: yesJournal of Applied Computer Science & Mathematics, 2016
Cycle bases belong to a k-connected simple graph used both for listing and enumerating Hamiltonian cycles contained in a planar graph. Planar cycle bases have a weighted induced graph whose weight values limited to 1.
Retno MAHARESI
doaj   +1 more source

Population and species neighbor identity impact trait–trait relationships and plant performance

open access: yesPopulation Ecology, EarlyView.
We evaluated how populations and species identity influence plant performance and trait outcomes in mixtures, and assessed trait variation among populations of two forb species native to the western United States (Dieteria canescens and Heterotheca villosa) following three interaction treatments (single‐population monoculture, two‐population mixture ...
Alicia J. Foxx   +2 more
wiley   +1 more source

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