Abstract We consider analytic families of planar vector fields depending analytically on the parameters in Λ \Lambda that guarantee existence a (may be degenerate and with characteristic directions) monodromic singularity. characterize structure asymptotic Dulac series Poincaré map associated to si...

Polynomial vector fields which admit a prescribed Darboux integrating factor are quite well-understood when the geometry of the underlying curve is nondegenerate. In the general setting morphisms of the affine plane may remove degeneracies of the curve, and thus allow more structural insight. In the present paper we establish some properties of integrating factors subjected to morphisms, and we...

By integrating past climate and fossil databases, these authors suggest that change was the primary factor in extinction of Homo species.

The aim of this paper is to identify morphological and motor structures which determine the achievement of top results in karate in the age group of younger cadets. With this purpose, a set of 18 morphological measures and a set of 12 motor tests were used on a sample of 60 male and 51 female Croatian karateka aged 13 to 15. Different morphological structures were isolated by factor analysis ac...

We study the Abel differential equations that admits either a generalized Weierstrass first integral or a generalized Weierstrass inverse integrating factor.

Integrating A/D converters have two characteristics in common. First, as the name implies, their output represents the integral or average of an input voltage over a fixed period of time. Compared with techniques which require that the input is “frozen” with a sample-and-hold, the integrating converter will give repeatable results in the presence of high frequency noise (relative to the measure...