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.. (לתיקייה המכילה) | |
In Question 1(A), can we write an optimization problem whose solution is the *squared* Euclidean distance of x_0 to H? | |
| Yes, you can, but prove the solution to both problems is identical. |
In Question 3(D) it is stated that "it is well known that a matrix M is invertible if and only if it is positive definite". This claim is not true in the forward direction. | |
| Indeed, that is a mistake. The correct statement should be "it is well known that a matrix M is invertible if it is positive definite". |