Graffiti it is a rapidly developing art form whose value is highly contested and reviled by many authorities while also subject to protection, sometimes within the same jurisdiction. Both "graffiti" and its occasional singular form "graffito" are from the Italian word "graffiato" ("scratched"). "Graffiti" is applied in art history to works of art produced by scratching a design into a surface. A related term is "sgraffito", which involves scratching through one layer of pigment to reveal another beneath it. This technique was primarily used by potters who would glaze their wares and then scratch a design into it. In ancient times
Generalized singular value decomposition reduces to the singular value decomposition, explaining the name. The weighted version of the generalized singular value decomposition (GSVD) is a constrained matrix decomposition with constraints imposed on the left and right singular vectors of the singular value decomposition. This form of the "GSVD" is an extension of the "SVD" as such. Given the "SVD" of an "m×n" real or complex matrix "M" where Where "I" is the Identity Matrix and where formula_22 and formula_23 are orthonormal given their constraints (formula_30 and formula_31). Additionally, formula_30 and formula_31 are positive definite matrices (often diagonal matrices of weights). This form of the