Results 271 to 280 of about 1,188,516 (315)

On even algebraic surfaces of general type

open access: yesOn even algebraic surfaces of general type
openaire  

On Lang's Conjecture for Surfaces of General Type

open access: yesCommunications in Algebra, 2003
Abstract Let m be a nonnegative integer. We explicitly bound the number of rational curves with arithmetic genus no greater than m on a surface of general type by geometric invariants of the surface. We also briefly discuss the possibility of bounding all rational curves lying on a surface of general type in ℙ3.
Kang, Cong X.
openaire   +2 more sources

On rational maps from a general surface in to surfaces of general type

advg, 2008
Abstract We study dominant rational maps from a general surface in to surfaces of general type. We prove restrictions on the target surfaces, and special properties of these rational maps. We show that for small degree the general surface has no such map.
Lucio Guerra, Gian Pietro Pirola
openaire   +1 more source

Surfaces of General Type

2004
In the first section we state the restrictions on (c 2 1, c 2) for minimal surfaces of general type. In the section following it, the “easy” inequalities c2 1 > 0 and c2 > 0 are proven and we show that there is only a finite number of (−2)-curves.
Wolf P. Barth   +3 more
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Some Results on Surfaces of General Type

Canadian Journal of Mathematics, 2005
AbstractIn this article we prove some new results on projective normality, normal presentation and higher syzygies for surfaces of general type, not necessarily smooth, embedded by adjoint linear series. Some of the corollaries of more general results include: results on property Np associated to KS ⊗B⊗n where B is base-point free and ample divisor ...
openaire   +1 more source

Kinematical Surfaces of General Type

2015
A generatrix curve of a kinematical surface of general type transferring from one position to another can keep a certain character of motion but parameters of movements, positions of axes and the direction of infinitesimal displacements of the generatrix line simultaneously change.
S. N. Krivoshapko, V. N. Ivanov
openaire   +1 more source

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