MML — Matrix Decomposition

Question 1

Codirected and collinear vectors

Answer 1

Two vectors that point in the same direction are called codirected. Two vectors are collinear if they point in the same or the opposite direction.

Question 2

Defective matrix

Answer 2

A square n×n matrix A ∈ R is defective if it possesses

fewer than n linearly independent eigenvectors.