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Additive representation of symmetric inverse M-matrices and potentials
(Academic Press-Elsevier, 2016)
In this article we characterize the closed cones respectively generated by the symmetric inverse M-matrices and by the inverses of symmetric row diagonally dominant M-matrices. We show the latter has a finite number of ...
Cauchy and Green matrices type and stability in alternately advanced and delayed differential systems
(2011)
In this paper, we study differential equations with piecewise constant argument of generalized (DEPCAGs) type, i.e., the argument is a general step function. They are hybrid equations combining properties of continuous and ...
Evaluación de matrices para la inmovilización de pseudomonas spp. en biorremediación de fenol
(Universidad Nacional de Colombia, 2003)
En el presente estudio se cultivaron Pseudomonas spp. inmovilizadas en tres matrices diferentes y un medio sin matriz con el fin de observar el comportamiento en la velocidad de remoción de un agente contaminante como el ...
Presence of Listeria monocytogenes in Chilean food matrices
(Elsevier, 2015)
Objectives: To compare Listeria monocytogenes strains obtained from food matrices with those from
environmental samples in the same food processing plant.
Methods and results: Between 2008 and 2012 the presence of L. ...
Fare evasion correction for smartcard-based origin-destination matrices
(Elsevier, 2020)
Origin-Destination matrices obtained from smartcard data are very valuable because they contain vast amounts of information and can be obtained at a very low cost. However, they can only account for trips paid by smartcard. ...
On polymorphism for discrete evolutionary dynamics driven either by selection or segregation distortion
(Springer, 2018-05)
We revisit some problems arising in the context of multiallelic discrete-time and deterministic evolutionary dynamics driven first by fitness differences and then by segregation distortion. In the model with fitness, we ...
Potentials of random walks on trees
(Elsevier, 2016)
In this article we characterize inverse M-matrices and potentials whose inverses are supported on trees. In the symmetric case we show they are a Hadamard product of tree ultrametric matrices, generalizing a result by ...