SciELO - Scientific Electronic Library Online

 
vol.22 issue3SOME RESULTS ON PRIME AND PRIMARY SUBMODULESCLASSES OF FORMS WITT EQUIVALENT TO A SECOND TRACE FORM OVER FIELDS OF CHARACTERISTIC TWO author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Proyecciones (Antofagasta)

Print version ISSN 0716-0917

Abstract

DAMMAK, JAMEL. Proyecciones (Antofagasta) [online]. 2003, vol.22, n.3, pp.209-236. ISSN 0716-0917.  http://dx.doi.org/10.4067/S0716-09172003000300004.

Given a binary relation R of basis E ,wedefine its dual R by R (x,y )=R (y,x ).Arelation R is self-dual if it is isomorphic to R .Abinaryrelation R 0 is hemimorphic to R ,ifitisisomor-phic to R or to R .Arelation R defined on n elements is ( ¾k )-half - reconstructible if it is determined, up to hemimorphism, by its restrictions of cardinality (n ¾k ). From [8] follows the ( ¾d )-half-reconstructibility of finite binary relations, for all d ³12.Weestab-lish the ( ¾d )-half-reconstructibility of finite binary relations, for all d Î{ 11 ,10 ,9 ,8 ,7 ,6 } .

Keywords : Relation de diférence; Relation binaire; Graphe; Hy-pomorphe; Hémimorphe; Reconstruction.

        · abstract in French     · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License