3 citations · 6 across the 5 of their papers we have counts for
13 papers
The degree of the bicanonical map of a surface with
Margarida Mendes Lopes, Rita Pardini
In this note it is shown that, given a smooth minimal complex surface of general type S with p_g(S)=0, K^2_S=3, for which the bicanonical map is a morphism, then the degree of the…
Numerical Godeaux surfaces with an involution
Alberto Calabri, Ciro Ciliberto, Margarida Mendes Lopes
Minimal algebraic surfaces of general type with the smallest possible invariants have geometric genus zero and K^2=1 and are usually called "numerical Godeaux surfaces". Although t…
Even sets of four nodes on rational surfaces
Alberto Calabri, Ciro Ciliberto, Margarida Mendes Lopes
We describe smooth rational projective algebraic surfaces X, over an algebraically closed field of characteristic different from 2, having an even set of four disjoint (-2)-curves…
A new family of surfaces with and
Margarida Mendes Lopes, Rita Pardini
Let S be a minimal complex surface of general type with p_g=0 such that the bicanonical map of S is not birational and let Z be the bicanonical image. In [M.Mendes Lopes, R.Pardini…
A note on a theorem of Xiao Gang
Margarida Mendes Lopes
In 1985 Xiao Gang proved that the bicanonical system of a complex surface of general type with is not composed of a pencil [Bull. Soc. Math. France, 113 (1985), 23--…
On surfaces with , and non-birational bicanonical map
Ciro Ciliberto, Margarida Mendes Lopes
In the present note we show that any surface of general type with , and non-birational bicanonical map has a pencil of curves of genus 2. Combining this result with pre…