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Existence of simply connected algebraic surfaces of general type with positive and zero indices
1Columbia University, New York, NY 10027.
Abstract:
In the classification problem of algebraic surfaces of general type, an important conjecture states that for simply connected such surfaces Chern numbers satisfy the inequality c(1) (2) = 2c(2) (or equivalently, the index tau = 0). We disprove this conjecture by computing fundamental groups of Galois coverings corresponding to generic CP(2) projections of projective embeddings of CP(1) x CP(1) related to linear systems [unk]al(1) + bl(2)[unk], a >/= 3, b >/= 2. Also, we proved the existence of simply connected minimal surfaces of general type with zero index (e.g., c(1) (2) = 2c(2)). Previously, it was conjectured that these are exactly the surfaces uniformizable in the polydisk. So this conjecture is also disproved.
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