Projective planes with non-finitely generated Cox rings.

This page is accompanying the aricle "Some non-finitely generated Cox rings" by Jose Gonzlez and Kalle Karu, arXiv:1407.6344.

Below are two lists of projective planes P(a,b,c) whose blowups at a point t in the big torus does not have a finitely generated Cox ring:

The C program that produced the lists. (It has minial documentation. Change N at the beginning, compile with "gcc -lm pplanes1.c" if using Linux.)