Linear Algebra, Eigenvectors, Python, Dimensionality Reduction, Matrix Factorization.
detA = 2(-1)-(-4.-1) = -6 and 3.-2 = -6 detA = λ1.λ2.λ3…..λn A.v=λ.v The sum of the eigenvalues is equal to the sum of the elements on the diagonals of the matrix. tr(A) = λ1 + λ2 +… +λn Python Code import numpy as np from numpy import linalg as LA A = np.array([[2,-4],[-1,-1]]) w, v = LA.eig(A)