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NumericalGodeaux :: precomputedTorsZ3Line

precomputedTorsZ3Line -- compute a line leading generically to a Z/3-Godeaux surface using a unirational parametrization

Synopsis

Description

The locus of lines in Q leading generically to marked numerical Godeaux surfaces with torsion group ℤ/3 is birational to a 1-bundle Z over 3  × ℙ1. The procedures gives two parametrization homomorphisms from Sa to the coordinate ring of Z, where the image of each map gives a point in Q whose connecting line is completely contained in Q and leads generically to a ℤ/3-Godeaux surface.

Ways to use precomputedTorsZ3Line :