Projective hulls and the projective Gelfand transform
نویسندگان
چکیده
منابع مشابه
Projective Hulls and the Projective Gelfand Transform
We introduce the notion of a projective hull for subsets of complex projective varieties parallel to the idea of a polynomial hull in affine varieties. With this concept, a generalization of J. Wermer’s classical theorem on the hull of a curve in Cn is established in the projective setting. The projective hull is shown to have interesting properties and is related to various extremal functions ...
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We denote by ∆ the closed unit disk, by Γ the unit circle, and by A0 the disk algebra, which consists of all functions holomorphic in int(∆) and continuous on ∆. By a module over A0 we mean a vector space M of continuous complex-valued functions on ∆ such that the constant 1 lies in M, and for every a0 ∈ A0 and φ ∈ M, one has a0 · φ ∈ M. In his book “Real and Complex Analysis” (1966) Walter Rud...
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Let $R$ be a ring and $M$ a right $R$-module with $S=End_R(M)$. A module $M$ is called semi-projective if for any epimorphism $f:Mrightarrow N$, where $N$ is a submodule of $M$, and for any homomorphism $g: Mrightarrow N$, there exists $h:Mrightarrow M$ such that $fh=g$. In this paper, we study SGQ-projective and $pi$-semi-projective modules as two generalizations of semi-projective modules. A ...
متن کاملAnalytic Discs, Global Extremal Functions and Projective Hulls in Projective Space
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ژورنال
عنوان ژورنال: Asian Journal of Mathematics
سال: 2006
ISSN: 1093-6106,1945-0036
DOI: 10.4310/ajm.2006.v10.n3.a5