Symbolically, the principal axes are E 1 = span ( ) , E 2 = span ( ) . {\displaystyle E_{1}={\text{span}}\left({\begin{bmatrix}1/{\sqrt {2}}\\-1/{\sqrt {2}}\end{bmatrix}}\right),\quad E_{2}={\text{span}}\left({\begin{bmatrix}1/{\sqrt {2}}\\1/{\sqrt {2}}\end{bmatrix}}\right).} To summarize: The equation is for an ellipse, since both eigenvalues are positive.
Simbolic, axele principale sunt E 1 = span ( ) , E 2 = span ( ) . {\displaystyle E_{1}={\text{span}}\left({\begin{bmatrix}1/{\sqrt {2}}\\-1/{\sqrt {2}}\end{bmatrix}}\right),\quad E_{2}={\text{span}}\left({\begin{bmatrix}1/{\sqrt {2}}\\1/{\sqrt {2}}\end{bmatrix}}\right).} Rezumat: Ecuația este pentru o elipsă , deoarece ambele valori proprii sunt pozitive.