Graffiti scratch glass and other hard surfaces, such as permanent marking pens and markers or paint sticks; evidence of membership or affiliation with any gang or tagging crew, paraphernalia to include any reference to "(tagger's name)," and any drawings, writings, objects, or graffiti depicting taggers' names, initials, logos, monikers, slogans, or mention of tagging crew membership; any newspaper clippings relating details of or referring to any graffiti crime. Graffiti Graffiti (both singular and plural; the singular "graffito" is very rare in English except in archeology) is writing or drawings made on a wall or other surface, usually without permission and within
Singular point of an algebraic variety at that is lower than the rank at other points of the variety. Points of "V" that are not singular are called non-singular or regular. It is always true that almost all points are non-singular, in the sense that the non-singular points form a set that is both open and dense in the variety (for the Zariski topology, as well as, in the case of varieties defined over the complexes, for the usual topology). In case of a real variety (that is the set of the points with real coordinates of a variety defined by polynomials with real coefficients), the