| 释义 |
involutorial, a. Geom.|ɪnvɒl(j)uːˈtɔərɪəl|
[f. It. involutorio, L. type *involūtōri-us (f. involvĕre, involūt-: see -ory) + -al1. Cf. med.L. involūtōrium a wrapper, cover (Du Cange).]
Of or pertaining to geometrical involution; connecting a system of objects in pairs.
involutorial homology, a homology whose parameter is -1.
1885C. Leudesdorf Cremona's Proj. Geom. 64 In this case the homology is called harmonic or involutorial, and two corresponding points (or lines) correspond to one another doubly; that is to say, every point (or line) has the same correspondent whether it be regarded as belonging to the first or the second figure. |