Dictionary

smoothness en · NOUN

Pronunciation

• (Southern-England) audio

Etymology

From Middle English smothenesse; equivalent to smooth + -ness. Compare Old English smēþnes (“smoothness, a smooth place, a level surface”).

Meanings

1. (countable, uncountable) The condition of being smooth; the degree or measure of said condition.
   • With it,^([a pavement profile]) paving operations can be adjusted "on the fly" to maintain or improve smoothness. 2013, Robert Otto Rasmussen, “et al.”, in Real-time Smoothness Measurements on Portland Cement Concrete Pavements During Construction, Transportation Research Board, page 3:
   • The ‘smoothness’ of distributions can be understood in various senses, this is why we used quotation marks before; further we will drop them. The smoothness can be understood as the differentiability of the distribution function, boundedness of some of its derivatives, the existence of the absolutely continuous component, the decrease of the characteristic function with a certain rate, the validity of the Cramér condition, the condition #92;sigma(#92;Phi)#92;rightarrow 0 as n#92;rightarrow#92;infty, etc. 1998, Vladimir V. Senatov, Normal Approximation: New Results, Methods and Problems, Walter de Gruyter (VSP), page 32:
   • The admirable smoothness of the riding also reflected the greatest credit on those who, despite the difficulties caused by the shortage of men and materials, have succeeded in maintaining the track in such first-class order. 1946 July and August, Cecil J. Allen, “British Locomotive Practice and Performance”, in Railway Magazine, page 213:
2. (countable, of a function, uncountable) The highest order of derivative (the differentiability class) over a given domain.
   • Smoothness can vary from 0 (for a nondifferentiable function) to infinity (for a smooth function).
3. (countable, of a function, qualifier:approximation theory; numerical analysis; approximation theory; numerical analysis, uncountable) The quantity measured by the modulus of smoothness.
   • A central problem in approximation theory is to characterize the best approximation of a function by polynomials, or other classes of simple functions, in terms of the smoothness of the function. In this chapter, we study the characterization of the best approximation by polynomials on the sphere. In the classical setting of one variable, the smoothness of a function on #92;mathbbS¹ is described by the modulus of smoothness, defined by the forward difference. 2013, Feng Dai, Yuan Xu, Approximation Theory and Harmonic Analysis on Spheres and Balls, Springer, page 79:

Forms

Antonyms

roughness (antonym(s) of “condition of being smooth”) · jerkiness (antonym(s) of “condition of being smooth”)

Deriveds

nonsmoothness · modulus of smoothness

Relateds

modulus of continuity · uniform continuity · modulus of smoothness · differentiability class

Translations (25)

sw ulaini (condition of being smooth) · fi sileys (quantitative measure of how smooth a function is) · nl gladheid (condition of being smooth) · hi चिकनाई (condition of being smooth) · lv gludums (condition of being smooth) · fi sileys (condition of being smooth) · la lēvitās (condition of being smooth) · bcl yumok (condition of being smooth) · ota دوزلك (condition of being smooth) · hy ողորկություն (condition of being smooth) · uk гла́дкість (condition of being smooth) · io glateso (condition of being smooth) · enm smothenesse (condition of being smooth) · ru гла́дкость (condition of being smooth) · fi tasaisuus (condition of being smooth) · be гла́дкасць (condition of being smooth) · su lemesna (condition of being smooth) · hu simaság (condition of being smooth) · pt suavidade (condition of being smooth) · de Glätte (condition of being smooth) · enm smethenesse (condition of being smooth) · it levigatezza (condition of being smooth) · fi pehmeys (condition of being smooth) · bg гладкост (condition of being smooth) · pl gładkość (condition of being smooth)