Constrained positive deÖnite matrixes
But we should also check another determinant asn p=2. Deleting the
last row and last column
det
0
@
0 2 /
p
3 2 /
p
3
2 /
p
3 1/
p
3 1 /
p
3
2 /
p
3 1 /
p
3 1/
p
3
1
A= ^16
9
p
3
Which is the right sign for the minimum condition asp=1 and in the
minimum case there is no alternation.