Extensions of mixed Hodge structures
نویسنده
چکیده
According to Deligne, the cohomology groups of a complex algebraic variety carry a generalized Hodge structure, or, in precise terms, a mixed Hodge structure [2]. The purpose of this paper is to introduce an absract theory of extensions of mixed Hodge structures which has proved useful in the study of low-dimensional varieties [1]. To give the theory meaning, we will give one simple, but illustrative application:
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