i2 : I = minors(2, matrix{{x_1, x_2, x_3}, {x_4, 0, 0}});
o2 : Ideal of W
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i5 : scan(keys B, k->print (k=>B#k)) -- CCs of Cech complex BEFORE pruning
{} => {ideal () => 1}
{0} => {ideal () => 1, ideal(x ) => 1, ideal(x ) => 1, ideal (x , x ) => 1}
2 4 4 2
{0, 1} => {ideal () => 1, ideal(x ) => 1, ideal(x ) => 1, ideal (x , x ) => 1, ideal(x ) => 1, ideal (x , x ) => 1, ideal (x , x ) => 1, ideal (x , x , x ) => 1}
3 4 4 3 2 4 2 3 2 4 3 2
{1} => {ideal () => 1, ideal(x ) => 1, ideal(x ) => 1, ideal (x , x ) => 1}
3 4 4 3
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