×

Spherical quadrangles. (English) Zbl 1190.51010

The authors treat 2 dimensional spherical quadrangles. They show that the moduli of congruence classes of spherical quadrangles has dimension 5.
The reviewer thinks that there are well known formulae in spherical trigonometry from old days and this is a simple application of such formulae. The reviewer hopes for some kind of applications of 3 dimensional spherical tetrahedra or spherical cubes.

MSC:

51M09 Elementary problems in hyperbolic and elliptic geometries
PDFBibTeX XMLCite
Full Text: EuDML EMIS