Find if the quadratic form \(f ( \vec { x } ) = 9 x _ { 1 } ^ { 2 } + 6 x _ { 1 } x _ { 2 } + 6 x _ { 2 } ^ { 2 } + 8 x _ { 2 } x _ { 3 } + 4 x _ { 3 } ^ { 2 }\) is positive definite or not.
Positive definiteness of $9x_1^2+6x_1x_2+6x_2^2+8x_2x_3+4x_3^2$
P-TRIV-LA45
- Area
- Prelim
- Status
- draft