Classification of projective surfaces and projective normality
نویسندگان
چکیده
منابع مشابه
Projective Normality of Algebraic Curves and Its Application to Surfaces
Let L be a very ample line bundle on a smooth curve C of genus g with 3g+3 2 < degL ≤ 2g − 5. Then L is normally generated if degL > max{2g+2−4h(C,L), 2g− g−1 6 −2h(C,L)}. Let C be a triple covering of genus p curve C′ with C φ → C′ and D a divisor on C′ with 4p < degD < g−1 6 − 2p. Then KC(−φ ∗D) becomes a very ample line bundle which is normally generated. As an application, we characterize s...
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Sunto. – In questo lavoro si generalizzano alcuni risultati di [3] riguardanti la proprieta’ di alcune curve nodali, su superficie non-singolari in Pr, di essere ”geometricamente linearmente normali” (concetto che estende la ben nota proprieta’ di essere linearmente normale). Precisamente, per una data curva C, irriducibile e dotata di soli punti nodali come uniche singolarita’, che giace su un...
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ژورنال
عنوان ژورنال: Tsukuba Journal of Mathematics
سال: 1998
ISSN: 0387-4982
DOI: 10.21099/tkbjm/1496163481