Linear Algebra, Svd, Eigenvectors, Eigenvalue, Data Science.
matrix is represented by X.Xᵀ — This represents the correlation of the people’s faces with each other. So X.Xᵀ = U . Σ. Vᵀ (x) V. Σ. Uᵀ X.Xᵀ= VΣ²Vᵀ (Crossing out Uᵀ.U ) AV = VΣ² (Multiplying by V on both sides) Here, V represents the Eigenvectors and Σ² represents the Eigenvalues. It is basically