Names for the number 0 in English English speaking countries. However this has not become the universal descriptor because as Douglas Coupland pointed out early in the decade "[Noughties] won't work because in America the word 'nought' is never used for zero, never ever". The American music and lifestyle magazine Wired favoured "Naughties'", which they claim was first proposed by the arts collective Foomedia in 1999. However, the term "Naughty Aughties" was suggested as far back as 1975 by Cecil Adams, in his column The Straight Dope. In scores for sporting events, in particular tennis, association football, the number 0 has the very specialized names "love", and
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