| 释义 |
iterative, a. and n.|ˈɪtərətɪv|
Also 5 yteratyve.
[a. F. itératif, -ive (1403 in Godef. Compl.), ad. late L. iterātīv-us (only as n. iterātīvum, sc. verbum), f. ppl. stem of iterāre to iterate: see -ive.]
A. adj.
1. a. Characterized by repeating or being repeated.
1490Caxton Eneydos viii. 35 In payenge the extreme tribute of remembraunce yteratyue..[she] toke the swerde in hir honde, and mounted vp alle on hie vpon the woode. 1624Brief Inform. Aff. Palatinate 18 The Estates redoubled their most humble instances, by their often and iteratiue Letters. 1807W. Taylor in Ann. Rev. V. 232 The voice of gratitude is not..still and small, but iterative and sonorous. 1863Cowden Clarke Shaks. Char. viii. 204 Shallow is iterative; he repeats and repeats. 1889J. M. Robertson Essays towards Crit. Method 119 One of Mr. Swinburne's iterative disquisitions. 1899Speaker 30 Dec. 339/2 His manner hesitating, iterative, involved.
b. iterative function (Math.), a function resulting from successive operations with the same operator.
c. Math. Of the nature of or employing iteration.
1924Whittaker & Robinson Calculus of Observations vi. 81 A pleasing characteristic of iterative processes may be observed..that a mistake in the performance of the numerical work does not invalidate the whole calculation. 1943Phil. Mag. XXXIV. 409 Iterative methods have found favour with computers, despite an outward semblance of clumsiness which masks their solid advantages from the casual critic. 1949Proc. Cambr. Philos. Soc. XLV. 230 Iterative methods seem very suitable, in principle, for application in large automatic calculating machines. 1953A. S. Householder Princ. Numerical Analysis ii. 44 Generally speaking, an iterative method for solving an equation or set of equations is a rule for operating upon an approximate solution xp in order to obtain an improved solution xp + 1, and such that the sequence {ob}xq{cb} so defined has the solution x as its limit. 1968E. T. Copson Metric Spaces viii. 115 The iterative process xn+ 1 = f(xn) leads to a solution of the equation x = f(x) when the mapping of the real line into itself is a contraction mapping.
2. Gram. Denoting repetition of action; frequentative. Applied to one of the aspects of the verb in Slavonic.
1827J. Heard Gram. Russ. Lang. v. §1. 142 The iterative [aspect of the verb] marks the frequent repetition of the action; as [strelivat′], to fire away, or to fire repeatedly. 1889Morfill Gram. Russian 36 Many verbs have no iterative aspect, and when a verb already ends in [-ivat′] or [-ȳvat′], it cannot take one.
B. n. Philol.
a. An iterative verb or aspect.
b. A word expressing repetition of an action, sound, etc.
1853,1884[see aspect n. 9 b]. 1934Priebsch & Collinson German Lang. i. i. 13 Formation of distributive numerals in Latin by adding -no to the iteratives. Ibid. ii. iii. 225 Verbs in -ern. Some are..iteratives..e.g. flattern. 1961F. G. Cassidy Jamaica Talk iv. 69 In Standard English one finds three kinds of iteratives: the simple ones like hush-hush..; those with vowel gradation like ding-dong..; and the rhyming ones like handy-dandy.
Hence ˈiteratively adv., in an iterative manner, with iteration; ˈiterativeness.
1844Fraser's Mag. XXX. 716/1 The complaints..are iteratively urged. 1868E. Edwards Ralegh I. vi. 104 The enormous proportion..of Irish matters, and their..characteristic iterativeness. Ibid. xx. 444 How conspicuously and iteratively the offer of money from Spain figured in the trials. |