| Albanese Variety |
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The Albanese variety generalises the construction of the Jacobian Variety of an Algebraic Curve ; and was introduced to study Algebraic Surface s. There the dimension of the Albanese is also the number ''h''1,0, traditionally called the ''irregularity'' of a surface. In terms of Differential Form s, any holomorphic 1-form on ''V'' is a Pullback of an invariant 1-form on the Albanese, coming from the holomorphic Cotangent Space of ''Alb''(''V'') at its identity element. Just as for the curve case, by choice of a Base Point on ''V'' (from which to 'integrate'), an Albanese morphism V is defined, along which the 1-forms pull back. This morphism is well-defined only up to a translation on the Albanese. In more abstract treatments, the Albanese variety is defined by means of one of its properties, namely being dual to the ( Connected Component of zero of the) Picard Variety classifying Invertible Sheaves on ''V''. The Duality Theory Of Abelian Varieties is used to pass from the Picard variety, which is constructed as a Representable Functor , to the Albanese. See also: Roitman's Theorem . |
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