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
Singular value of the sum of the "p"th powers of the singular values. Note that each norm is defined only on a special class of operators, hence "s"-numbers are useful in classifying different operators. In the finite-dimensional case, a matrix can always be decomposed in the form "U"Σ"V", where "U" and "V" are unitary matrices and "Σ" is a diagonal matrix with the singular values lying on the diagonal. This is the singular value decomposition. For formula_2 and formula_3. Min-max theorem for singular values. Here formula_4 is a subspace of formula_5 of dimension formula_6. Matrix transpose and conjugate do not alter singular