ListarMAT_Articles por tema "rational surfaces"
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Non-positive and negative at infinity divisorial valuations of Hirzebruch surfaces
Springer Verlag (2020-05)We consider rational surfaces Z defined by divisorial valuations ν of Hirzebruch surfaces. We introduce concepts of non-positivity and negativity at infinity for these valuations and prove that these concepts admit nice ... -
The cone of curves and the Cox ring of rational surfaces given by divisorial valuations
Elsevier (2016-02)We consider surfaces X defined by plane divisorial valuations ν of the quo- tient field of the local ring R at a closed point p of the projective plane P 2 over an arbitrary algebraically closed field k and ...