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</script>The main result of the paper is a boundedness for $n$-complements on algebraic surfaces. In addition, applications of this theorem to a classification of log Del Pezzo surfaces and of birational contractions for 3-folds are formulated.
105 pages. Minor typos corrected
Mathematics - Algebraic Geometry, 14E05, 14E30, 14J25, 14J30, Rational and ruled surfaces, FOS: Mathematics, \(3\)-folds, Minimal model program (Mori theory, extremal rays), Algebraic Geometry (math.AG)
Mathematics - Algebraic Geometry, 14E05, 14E30, 14J25, 14J30, Rational and ruled surfaces, FOS: Mathematics, \(3\)-folds, Minimal model program (Mori theory, extremal rays), Algebraic Geometry (math.AG)
| citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 69 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
