A bound for the degree of smooth surfaces in not of general type
A new family of surfaces with and
A note on a theorem of Horikawa.
In this paper we classify the algebraic surfaces on C with KS2=4, pg=3 and canonical map of degree d=3. By our result and the previous one of Horikawa (1979) we obtain the complete determination of surfaces with K2=4 and pg=3.
A note on a theorem of Xiao Gang.
In 1985 Xiao Gang proved that the bicanonical surface of a complex surface S of general type with p2(S) > 2 is not composed of a pencil. In this note a new proof of this theorem is presented.
A remark on the geography of surfaces with birational canonical morphisms.
A surface of general type with Pg = q = 0, K2 = 1.
Adjunction mappings on numerical quadrics.
Algebraic surfaces of general type with c21 = 3pg - 6.
Algebraic surfaces of general type with P9 smaller or equal to 7 and K very ample
Algebraic surfaces whose canonical image has a pencil of rational curves of degree two.
Automorphisms of order three on numerical Godeaux surfaces
We prove that a numerical Godeaux surface cannot have an automorphism of order three.