Sezaro's formula and polar-zonohedral

Abstract

The author was not interested in the application of the formula for determining planes of symmetry, which is very limited, since it applies only to cases when the planes of symmetry pass through all axes of symmetry (that is, only to mirror types of symmetry, when symmetrical figures can be reproduced in gonohedral mirrors), and the formula itself with its numerical relationships. October 15, 1915. The same author and in the same journal (April 1916 p. 324) reproduces Miller's formula given in these Notes (V 233). May 4, 1916.