2x2.ref

2 extreme rays
2 support hyperplanes

embedding dimension = 4
rank = 2

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2 extreme rays:
 0 1 1 0
 1 0 0 1

2 support hyperplanes:
 0 1 0 0
 1 0 0 0

2 equations:
 1 0  0 -1
 0 1 -1  0

2 basis elements of lattice:
 1 0 0 1
 0 1 1 0