homographyn.

/həʊˈmɒɡrəfi/

Etymology: < homo- comb. form + Greek -γραϕια writing, -graphy comb. form.

1. Geometry. The relation between homographic figures; = homology n. 4.

ΘΚΠ

the world > relative properties > number > geometry > [noun] > geometrical relation

congruity1656

symmetry1823

homography1859

homology1863

1859 Cayley 6th Mem. Quantics in Philos. Trans. (Royal Soc.) 149 77 The theory of homography in geometry of two dimensions may be made to depend upon..the homography of ranges or pencils.

1959 E. M. Patterson Topol. (ed. 2) ii. 21 Congruence and similarity in Euclidean geometry and homography in projective geometry are all equivalence relations.

1965 H. Eves Surv. Geom. II. xii. 203 A transformation of the form ź = (az + b)/(cz + d), ad —bc ≠ 0, is called a homography (or bilinear substitution).

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2. Grammar. ‘That method of spelling in which every sound is expressed by a single character, which represents that sound and no other’ (Webster 1864).

This entry has not yet been fully updated (first published 1899; most recently modified version published online June 2018).

单词	homography
释义	homographyn. /həʊˈmɒɡrəfi/ Etymology: < homo- comb. form + Greek -γραϕια writing, -graphy comb. form. 1. Geometry. The relation between homographic figures; = homology n. 4. ΘΚΠ the world > relative properties > number > geometry > [noun] > geometrical relation congruity1656 symmetry1823 homography1859 homology1863 1859 Cayley 6th Mem. Quantics in Philos. Trans. (Royal Soc.) 149 77 The theory of homography in geometry of two dimensions may be made to depend upon..the homography of ranges or pencils. 1959 E. M. Patterson Topol. (ed. 2) ii. 21 Congruence and similarity in Euclidean geometry and homography in projective geometry are all equivalence relations. 1965 H. Eves Surv. Geom. II. xii. 203 A transformation of the form ź = (az + b)/(cz + d), ad —bc ≠ 0, is called a homography (or bilinear substitution). Categories » 2. Grammar. ‘That method of spelling in which every sound is expressed by a single character, which represents that sound and no other’ (Webster 1864). This entry has not yet been fully updated (first published 1899; most recently modified version published online June 2018). < n.1859
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