Ferragut, Antoni; Galindo Pastor, Carlos; Monserrat Delpalillo, Francisco José(Elsevier, 2015-10-01)
We give an algorithm for deciding whether a planar polynomial differential system
has a first integral which factorizes as a product of defining polynomials of curves
with only one place at infinity. In the affirmative ...
Galindo Pastor, Carlos; Monserrat Delpalillo, Francisco José(Springer Verlag (Germany), 2014-01)
We construct evaluation codes given by weight functions defined over polynomial rings in m a parts per thousand yen 2 indeterminates. These weight functions are determined by sets of m-1 weight functions over polynomial ...
Monserrat Delpalillo, Francisco José; Galindo Pastor, Carlos(American Mathematical Society, 2012)
[EN] In this paper, the authors are interested in some applications of valuation theory to algebraic geometry and, particularly, to singularity theory. The aim of this paper is to provide a concise survey of some aspects ...
Galindo Pastor, Carlos; Monserrat Delpalillo, Francisco José; Olivares, Jorge(Walter de Gruyter GmbH, 2021-10-10)
[EN] We study foliations F on Hirzebruch surfaces Sd and prove that, similarly to those on the projective plane, any F can be represented by a bi-homogeneous polynomial affine 1-form. In case F has isolated singularities, ...
[EN] We consider the value (mu) over cap(nu) = lim(m -> infinity) m(-1) a(mL), where a(mL) is the last value of the vanishing sequence of H-0(mL) along a divisorial or irrational valuation nu centered at O-P2,(p), L ...
Ferragut, Antoni; GALINDO PASTOR, CARLOS; Monserrat Delpalillo, Francisco José(Elsevier, 2019-10-15)
[EN] We study the class of planar polynomial vector fields admitting Darboux first integrals of the type Pi(r)(i=1) f(i)(alpha i), where the alpha(i)'s are positive real numbers and the f(i)'s are polynomials defining ...
Galindo Pastor, Carlos; Monserrat Delpalillo, Francisco José(Elsevier, 2016-02-26)
We consider surfaces X defined by plane divisorial valuations v of the quotient field of the local ring R at a closed point p of the projective plane P-2 over an arbitrary algebraically closed field k and centered at R. ...
Galindo Pastor, Carlos; Hernando, Fernando; Monserrat Delpalillo, Francisco José(Cambridge University Press (CUP), 2016)
We give an explicit formula for the log-canonical threshold of a reduced germ of plane curve. The formula depends only on the first two maximal contact values of the branches and their intersection multiplicities. We also ...
Galindo Pastor, Carlos; Monserrat Delpalillo, Francisco José(Elsevier, 2014-06-01)
We solve the Poincaré problem for plane foliations with only one dicritical divisor. Moreover, in this case, we give a simple algorithm that decides whether a foliation has a rational first integral and computes it in the ...