The Lumpenproletariat (directly translated: rag-proletariat) is a term used by Marxists to describe the section of the proletariat that can't find legal work on a regular basis. These may be prostitutes, beggars, or homeless people.
... the formula should be understood as "either of those element(s) of the field whose square equals b2 - 4ac". In some fields, some elements have no ...