[f. as prec. + -ENCY.]

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  1.  The state or quality of being convergent.

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1709.  Berkeley, Th. Vision, § 35. The convergency or divergency of the rays.

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1831.  Brewster, Optics, iv. § 41. Rays of different degrees of divergency and convergency.

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1846.  Joyce, Sci. Dial., xvii. 312. To collect the light, or to bring it to a proper degree of convergency.

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  b.  transf. and fig. of things immaterial.

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1801.  Foster, in Life & Corr. (1846), I. 140. A kind of convergency in my feelings.

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  2.  Math.; cf. CONVERGENCE 3.

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1791.  E. Waring, in Phil. Trans., LXXXI. 15. Many more propositions concerning infinite series and their convergency are given in the Medit. Analyt.

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1887.  Hall & Knight, Higher Algebra, xxi. heading, Convergency and Divergency of Series. Ibid., 279, 230. Rules by which we can test the convergency or divergency of a given series without effecting its summation.

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  3.  = CONVERGENCE 1, 2.

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1794.  G. Adams, Nat. & Exp. Philos., II. xv. 162. The point of convergency.

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1836.  Landor, Per. & Asp., ccxxv. Humours, the idioms of life … are generalised in the concourse and convergency of innumerable races.

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