periodic.square.2d 354 Bytes
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DIM: 2
DIM_OF_WORLD: 2

number of elements: 8
number of vertices: 9

vertex coordinates:
-1 -1 
0 -1 
1 -1 
-1 0 
0 0 
1 0 
-1 1 
0 1 
1 1 

element vertices:
0 4 3
4 0 1
1 5 4
5 1 2
3 7 6
7 3 4
4 8 7
8 4 5

element boundaries:
0 -1 0
-2 0 0
0 0 0
-2 -1 0
-2 -1 0
0 0 0
-2 0 0
0 -1 0

element neighbours:
5 3 1
4 2 0
7 1 3
6 0 2
1 7 5
0 6 4
3 5 7
2 4 6