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29.139  Articles
1 of 2.915 pages  |  10  records  |  more records»
We investigate pattern avoidance in alternating permutations and an alternating analogue of Young diagrams. In particular, using an extension of Babson and West's notion of shape-Wilf equivalence described in our recent paper (with N. Gowravaram), we... see more

We study the relationship between two notions of pattern avoidance for involutions in the symmetric group and their restriction to fixed-point-free involutions. The first is classical, while the second appears in the geometry of certain spherical varietie... see more

We study the relationship between two notions of pattern avoidance for involutions in the symmetric group and their restriction to fixed-point-free involutions. The first is classical, while the second appears in the geometry of certain spherical varietie... see more

Resumen Las causas de las interrupciones y retrasos en los proyectos de construcción de infraestructura son conocidos pero inevitables, y los métodos actuales de análisis son caros. En este trabajo se propone una metodología moderna para el mantenimi... see more

Sympatric and similar body-sized species exhibit interspecific competition for resources.  The present study investigated diel activity of five meso-carnivore species (Canis aureus, Felis chaus, Paradoxurus hermaphroditus, Viverricula indica, and Her... see more

We consider special patterns of lengths 5 and 6 in a ternary alphabet. We show that some of them are unavoidable in square-free words and prove avoidability of the other ones. Proving the main results, we use  Fibonacci words as codes of ternary word... see more

Hultman, Linusson, Shareshian, and Sjöstrand gave a pattern avoidance characterization of the permutations for which the number of chambers of its associated inversion arrangement is the same as the size of its lower interval in Bruhat order. Hu... see more

This paper starts the Wilf-classification of mesh patterns of length 2. Although there are initially 1024 patterns to consider we introduce automatic methods to reduce the number of potentially different Wilf-classes to at most 65. By enumeratin... see more

Background and objectives: Among the main dysfunctions of borderline personality disorder, a topic of interest is the study of attentional mechanisms that evaluates which stimuli attracts patients’ attention and how patients process incoming stimuli. Diff... see more

1 of 2.915 pages  |  10  records  |  more records»