| 释义 |
▪ I. ˈsubset, n.1
[f. subset v.]
An act of subsetting or subletting.
a1722,1765–8[see subsetting below].
▪ II. ˈsubset, n.2
[f. sub- 5 c + set n.2]
A subordinate set; a set all the elements of which are contained in another set.
1902Encycl. Brit. XXIX. 121/1 It may be possible to divide the set into a number of subsets, no two of which contain a common object. 1911Trans. Amer. Math. Soc. XII. 285 Among such [compact] assemblages one very important class are those which have the property that the first derived set (E′) of every subset (E) of (D) is closed. 1928Amer. Jrnl. Math. L. 521 In studying these difficulties we are led to the introduction of a new notion of a subset of a point set being connected through the complement of the point set. 1961M. A. K. Halliday in Word XVII. 276 Subsets progressively differentiated as the degree of collocational likeness set as defining criterion increases. 1968E. T. Copson Metric Spaces v. 67 Let a and b be two points of a subset A of a metric space M. 1977J. L. Harper Population Biol. Plants xiii. 416 There are 45 species of Heliconius, each specializing on its own sub-set of Passiflora species. 1980Amer. Speech 1976 LI. 165 We cannot always extrapolate from a corpus to the language in general or even to some subset of the language.
▪ III. subset, v. Sc.|sʌbˈsɛt|
[f. sub- 9 (b) + set v.1]
trans. To underlet, sublet.
1681Stair Inst. Law Scot. i. xiii. 253 As the half may be sub-sett, so any other right less then the value of the half, is sustained as an Infeftment of warrandice. 1752Scots Mag. Nov. 551/2 A small farm.., which he had subset at about 6 l. Sterling per annum. 1801Farmer's Mag. Nov. 381 A missive of tack,..which made no mention of assignees,..was..found, neither capable of being assigned, nor subset. 1806Scott Fam. Lett. (1894) I. 35, I have subset the whole of the sheep farm. 1838W. Bell Dict. Law Scot. 582 To assign or subset a lease of the ordinary endurance of nineteen years.
b. absol. or intr.
1801Farmer's Mag. Nov. 379 A tack of lands does not imply a power, either to assign, or even to subset. 1838W. Bell Dict. Law Scot. 582 In such leases..an express authority to assign or subset must be given.
Hence subˈsetting vbl. n.; subˈsettable a., capable of being subset.
a1722Fountainhall Decis. I. 454 The axiom against sub-setting is only against an assignment... But a sub-set is lawful, and was so found 12 March 1686. 1765–8Erskine Inst. Law Scot. ii. vi. §33 (1773) 265 It remains a doubt, whether the power of subsetting is implied in the nature of a tack, without a special clause. Ibid., By a subset the principal tacksman is not changed. 1801Farmer's Mag. Nov. 379 All tacks, likewise, that are to subsist for a great length of time, are also assignable, as well as subsettable. |