there is also the square = i.10
and so if 10$ 0 is a parameter, the dyadic
V =: { =@:i.
0 2 4 V 10
1 0 0 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 0 0 1 0 0 0 0 0
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