Svd, Singular Values, Eigenvalue, Eigenvectors, Sklearn.
using v1 and v2 vectors. So, first, the eigenvectors v1, and v2 of V (they’re orthogonal) are mapped into two orthogonal basis vectors e1, and e2, then scaled by Σ into orthogonal σ1e1,σ2e2, then mapped by unitary U to σ1u1,σ2u2. The linear map A is fully defined by the transformation of these