We assume that all varieties are projective, normal, and defined over C.

BACKGROUND Studies on popular names of birds help to understand the relationship between human beings and birds and it also contributes to the field of ornithology. METHODS This study aims to register the ethnotaxonomy of birds in the village of Pedra Branca, Santa Teresinha municipality, Bahia State, Brazil, by cataloguing and identifying their popular names, besides understanding the ethnoc...

In 3 studies, we document various properties of perceiver effects--or how an individual generally tends to describe other people in a population. First, we document that perceiver effects have consistent relationships with dispositional characteristics of the perceiver, ranging from self-reported personality traits and academic performance to well-being and measures of personality disorders, to...

In this paper, we study the hybrid function projective synchronization between coupled complex discrete networks with different dimensions. The hybrid function projective synchronization is achieved by designing an adaptive control method. Based on the designed controller and the Lyapunov stability theory, we derive sufficient conditions to realize the hybrid function projective synchronization...

There are only finitely many locally projective regular polytopes of type {5, 3, 5}. They are covered by a locally spherical polytope whose automorphism group is J1 × J1 × L2(19), where J1 is the first Janko group, of order 175560, and L2(19) is the projective special linear group of order 3420. This polytope is minimal, in the sense that any other polytope that covers all locally projective po...

Non-projectivity is an important theoretical and computational concept that has been investigated extensively in the dependency grammar/parsing paradigms. However, from a human sentence processing perspective, non-projectivity has received very little attention. In this paper, we look at existing work and propose new factors related to processing non-projective configuration. We argue that (a) ...

We show how discrete torsion can be implemented in D = 4, N = 1 type IIB orientifolds. Some consistency conditions are found from the closed string and open string spectrum and from tadpole cancellation. Only real values of the discrete torsion parameter are allowed, i.e. ǫ = ±1. Orientifold models are related to real projective representations. In a similar way as complex projective representa...

The group of projectivities of (a line of) a projective plane is always 3-transitive. It is well known that the projective planes with a sharply 3-transitive group of projectivities are classi/ed: they are precisely the Pappian projective planes. It is also well known that the group of projectivities of a generalized polygon is 2-transitive. Here, we classify all generalized quadrangles, all /n...

To every non-singular elliptic curve (complex torus) we assign a C∗algebra Tθ = {u, v | vu = e uv} known as noncommutative torus. It is shown that morphisms of elliptic curves generate Morita equivalence of the corresponding noncommutative tori. Real number θ we call projective curvature attached to the elliptic curve. It is proved that projective curvatures of isomorphic elliptic curves are mo...

In this puper, we treat the calibraitim probla in tens of projective geaelry. The projective essences of caaera calibration and calibral ing active 30 visio~~ systm c m p o s d of a camera and a plane structured light source are discussed. And based a r the tlreoras in projective gemel ry. the necessary and sufficient conditions for solving these calibration problms have been given nnd proval. ...