scispace - formally typeset
Search or ask a question

Showing papers in "Revista Matematica Complutense in 1995"




Journal ArticleDOI
TL;DR: In this article, the existence, uniqueness and quali- tative behaviour of weak solutions to nonlinear conservation laws, of the form of weak nonlinear solutions to conservation laws is studied.
Abstract: We are concerned with the existence, uniqueness and quali- tative behaviour of weak solutions to nonlinear conservation laws, ofthe form

6 citations


Journal ArticleDOI
TL;DR: A metabelian group G actirag as automorphism group on a compact Riemann surface of genus g > 2 has order less than or equal to 16(g − 1) as mentioned in this paper.
Abstract: A metabelian group G actirag as automorphism group on a compact Riemann surface of genus g > 2 has order less than or equal to 16(g — 1). We calculate for which values of y this bound is achieved and on these cases we calculate a presentatiora of the group G.

6 citations


Journal ArticleDOI
TL;DR: In this article, error estimates and their convergence rates for a approximate solutions of spectral Galerkin type for the equations for the motion of a viscaus chemical active fluid in a baunded domain are studied.
Abstract: We study error estimates and their convergence rates for a approximate solutions of spectral Galerkin type for the equations for the motion of a viscaus chemical active fluid in a baunded domain. We find error estimates that are uniform in time and amo optimal in the L 2-norm and H1- norm. New estimates in the H1-norm are given.

3 citations



Journal ArticleDOI
TL;DR: In this paper, the authors analyse the symmetries of a generic front with respect to the group generated by the invo- lutions reversing the orientation of the plane, the orientations of the preimage dicte and the co-orientation of the contact plane.
Abstract: Afrontis the projection on the plane of a legendrian immer- sion of a circie in the space of the contad elements of that plane. 1 analyse the symmetries ofa generic front with respect to the group generated by the invo- lutions reversing the orientation of the plane, the orientation of the preimage dicte and tSe coorientation of the contact plane.

2 citations



Journal ArticleDOI
TL;DR: There are defined sequeratial moduli for real sequences as mentioned in this paper, and properties of sequence spaces generated by xneans of the aboye moduli are investigated in this paper.
Abstract: There are defined sequeratial moduli ira the rernainder ferm fer real sequences. Properties of sequence spaces generated by xneans of the aboye moduli are investigated.

2 citations


Journal ArticleDOI
TL;DR: In this paper, the exact controllability of the generalized telegraph equation was studied in the bouix-dary model and the controllable version of it was analyzed.
Abstract: In this paper we present a study of the exact controllability in the bouixdary,of the generalized telegraph equation (Ki(z, t)y')'+K2(z, t)y'+Ka(z, t)y— ~ ~— (aii(z~ t)»~!~) = Oen

1 citations



Journal ArticleDOI
TL;DR: In this article, the authors prove the partial exact controllability of a nonlinear system using semigroup formulation together with fixed paint approach to study the nonlinear nonlinear systems.
Abstract: AHSTRACT. In this article, we prove the partial exact controllability of a nonlinear system. We use semigroup formulation together with fixed paint approach to study the nonlinear system.