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On the slope of fibred threefolds

dc.contributor.authorBarja Yáñez, Miguel Ángel
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Matemàtica Aplicada I
dc.date.accessioned2007-05-09T16:04:03Z
dc.date.available2007-05-09T16:04:03Z
dc.date.created1998
dc.date.issued1998
dc.identifier.urihttp://hdl.handle.net/2117/967
dc.description.abstractWe study from a geographical point of wiew fibrations of threefolds over smooth curves $f: T \longrightarrow B$ such that the general fibre is of general type. We prove the non-negativity of certain relative invariants under general hypotheses and give lower bounds for $K^3_{T/B}$ depending on other relative invariants. We also study the influence of the relative irregularity $q(T)-g(B)$ on these bounds. A more detailed study of the lowest cases of the bounds is given.
dc.format.extent34
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 2.5 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.5/es/
dc.subject.lcshGeometry, Algebraic
dc.subject.lcshSurfaces
dc.subject.otherFibred threefolds
dc.subject.otherslope
dc.subject.otherrelative invariants
dc.titleOn the slope of fibred threefolds
dc.typeArticle
dc.subject.lemacFibrats (Matemàtica)
dc.subject.lemacSuperfícies
dc.subject.lemacVarietats (Matemàtica)
dc.contributor.groupUniversitat Politècnica de Catalunya. EGSA - Equacions Diferencials, Geometria, Sistemes Dinàmics i de Control, i Aplicacions
dc.subject.amsClassificació AMS::14 Algebraic geometry::14D Families, fibrations
dc.subject.amsClassificació AMS::14 Algebraic geometry::14J Surfaces and higher-dimensional varieties
dc.rights.accessOpen Access
local.personalitzacitaciotrue


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