| LIB "arr.lib";
ring r;
arrLattice(arrTypeB(3));
==>
==>
==> === Computing poset ===
==>
==>
==> rank 2: found 13 flats in 0s
==> rank 3: found 1 flats in 0s
==>
==>
==> Matrix tests: 86
==> Given Arrangement:
==> _[1]=x-y
==> _[2]=x+y
==> _[3]=x-z
==> _[4]=x+z
==> _[5]=x
==> _[6]=y-z
==> _[7]=y+z
==> _[8]=y
==> _[9]=z
==>
==> Corresponding poset:
==> ====== rank 1: 9 flats ======
==> (1), (2), (3), (4), (5), (6), (7), (8), (9),
==> ====== rank 2: 13 flats ======
==> (1,2,5,8), (1,3,6), (1,4,7), (1,9), (2,3,7), (2,4,6), (2,9), (3,4\
,5,9), (3,8), (4,8), (5,6), (5,7), (6,7,8,9),
==> ====== rank 3: 1 flats ======
==> (1,2,3,4,5,6,7,8,9),
==>
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