Names for the number 0 in English the first recorded usage of the word "love" to mean "no score" is by Hoyle in 1742 (OED, 2nd Edition). BBC Radio 5 Live has broadcast spin-off versions of its football phone-in 6-0-6 (""six-oh-six"") focused on cricket and tennis, branded as "6-Duck-6" and "6-Love-6" respectively, in the summer months during the soccer off-season. Another name for 0 that is used in sports is "nil". This is derived from the Latin word "nihil", which means "nothing". Although common in British English, in football results and the like, it is only used infrequently in U.S. English. The British "nil" is not slang,
Zero of a function a "zero locus". In analysis and geometry, any closed subset of formula_32 is the zero set of a smooth function defined on all of formula_32. This extends to any smooth manifold as a corollary of paracompactness. In differential geometry, zero sets are frequently used to define manifolds. An important special case is the case that formula_1 is a smooth function from formula_35 to formula_32. If zero is a regular value of formula_1, then the zero set of formula_1 is a smooth manifold of dimension formula_39 by the regular value theorem. For example, the unit formula_40-sphere in formula_41 is the zero