Machine Learning, Data Science, Linear Algebra, Compression, Singular Values.
vector x, to get Mx = USV*x. First V* rotates x into a new coordinate system, then S scales V*x, and finally U rotates SV*x back to the original coordinate system that x was in, to get the final product of Mx = USV*x: Credit: https://en.wikipedia.org/wiki/Singular_value_decomposition The matrix S