单词 | lacunary |
释义 | lacunaryadj. 1. Of or pertaining to a lacuna; consisting of or resembling lacunæ. ΚΠ 1857 E. C. Otté tr. A. de Quatrefages de Bréau Rambles Naturalist II. 289 Lacunary passages connected these two cavities together. 1868 P. M. Duncan tr. L. Figuier Insect World Introd. 14 On reaching the interior of the head it opens in the lacunary inter~organic system. 2. Mathematics. lacunary function (see quots.). lacunary space: an area in a plane, every point of which is the affix of a value of the variable for which a given function has no determinate values. ΚΠ 1893 Cayley in Q. Jrnl. Math. May 281 A function such as this, existing only for points within a certain region and not for the whole of the infinite plane, is said to be a lacunary function. 1893 A. R. Forsyth Theory Functions Complex Variable §87. 141 Weierstrass was the first to draw attention to lacunary functions as they may be called. 1893 A. R. Forsyth Theory Functions Complex Variable §87. 143 The first step in the construction of a function which shall have any assigned lacunary space. This entry has not yet been fully updated (first published 1901; most recently modified version published online March 2022). < adj.1857 |
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