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% Example input file for cohomCalg
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% This file contains the geometry data of the del-Pezzo-1 surface, which
% corresponds to the single blowup of the CP^2 projective space
%
% The vertices and GLSM charges:
vertex u1 = ( 1, 1 ) | PIC: H | GLSM: ( 1, 0 );
vertex u2 = ( -1, 0 ) | GLSM: ( 1, 0 );
vertex u3 = ( 0, -1 ) | GLSM: ( 1, 1 );
vertex u4 = ( 0, 1 ) | PIC: X | GLSM: ( 0, 1 );
% The Stanley-Reisner ideal:
srideal [u1*u2, u3*u4];
% Computation time for this example is quasi-instantaneous,
% so turn off intermediate files:
monomialfile off;
% And finally the requested line bundle cohomologies:
ambientcohom O(-1, -2);
ambientcohom O(-2, 0);
ambientcohom O(-3, -2);