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Which of the following is not a condition for a given real nonsingular quadratic form, Q = XTAX, to be a negative defini

Posted: Thu Jul 14, 2022 9:41 am
by answerhappygod
a) The number of positive square terms in the quadratic form is equal to zero
b) The rank of the matrix A is equal to the number of variables in the quadratic form (index)
c) All the eigen values of A are negative
d) The rank and index are equal