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200 1 $aPoemas Escogidos$fDamaso Alonso
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181   $ctxt
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183   $acr
200 10$aOn degenerations of algebraic surfaces /$fUlf Persson
210  1$aProvidence :$cAmerican Mathematical Society,$d[1977]
210  4$d©1977
215   $a1 online resource (163 p.)
225 1 $aMemoirs of the American Mathematical Society ;$vnumber 189
300   $aDescription based upon print version of record.
311   $a0-8218-2189-X 
320   $aIncludes bibliographical references and index.
327   $a""Table of Contents""; ""Introduction""; ""I. A brief survey of the structure and classification of surfaces""; ""Ruled surfaces""; ""Elliptic surfaces""; ""The classification table of surfaces""; ""II. The structure of a degeneration""; ""1. The singular fiber""; ""2. The local behavior near the singular fiber""; ""3. The global structure of N close to N[sub(0)]""; ""4. Intersection theory on N and its applications""; ""5. The Mayer-Vietoris spectral sequence, and the calculations of the Betti numbers of the general fiber in terms of the special""; ""6. Projective Degenerations""
327   $a""7. Mixed Hodge structures and the Clemens-Schmid exact sequence""""III. Degenerations of surfaces""; ""1. Specializations of birational isomorphisms and some of its applications""; ""2. Degenerations of elliptic surfaces""; ""3. Degenerations of minimal N = 0 surfaces in the case of no triple points""; ""IV. Lemmas on Curves on Surfaces""; ""V. Deformations of two surfaces meeting along a non-singular curve""; ""1. C is rational""; ""2. C is nonrational""; ""Bibliography""; ""Appendix 1. Elementary examples of degenerations""; ""Appendix 2. A degeneration of Enriques surfaces""
327   $a""Appendix 3. A degeneration of Godeaux surfaces""""Appendix 4. The index of cruciality for elliptic curves in elliptic ruled surfaces""; ""Bibliography of the appendix""; ""List of symbols and notational conventions""; ""Index""
410  0$aMemoirs of the American Mathematical Society ;$vno. 189.
606   $aSurfaces, Algebraic$xDegenerations
608   $aElectronic books.
615  0$aSurfaces, Algebraic$xDegenerations.
676   $a512/.33
700   $aPersson$b Ulf$f1950-$0992139
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