QUADRATIC FORMS AND DEFINITE MATRICES
Definitions of definite and semi-definite matrices. Let A be a square matrix of order n and let x be an n elementvector. Then A is said to be positive semidefiniteiff for all vectors x. QUADRATIC FORMS AND DEFINITE MATRICES 5 FIGURE 3. Positive Semi-Definite Quadratic Form 2x2 1+4x x2 +2x22-5 0 5 x1-5
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