A singular value for which we can find two left (or right) singular vectors that are linearly independent is called "degenerate". If formula_44 and formula_45 are two left-singular vectors which both correspond to the singular value σ, then any normalized linear combination of the two vectors is also a left-singular vector corresponding to the singular value σ. The similar statement is true for right-singular vectors. The number of independent left and right-singular vectors coincides, and these singular vectors appear in the same columns of and corresponding to diagonal elements of formula_5 all with the same value "σ".