Complexity
For positive definite Q, the ellipsoid method solves the problem in polynomial time. If, on the other hand, Q is indefinite, then the problem is NP-hard. In fact, even if Q has only one negative eigenvalue, the problem is NP-hard.
Read more about this topic: Quadratic Programming
Famous quotes containing the word complexity:
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—Jean Baudrillard (b. 1929)