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An Intrinsic Formula for the Cross Ratio in Spherical and Hyperbolic Geometries

Authors :
Robert L. Foote
Xidian Sun
Source :
The College Mathematics Journal. 46:182-188
Publication Year :
2015
Publisher :
Informa UK Limited, 2015.

Abstract

The cross ratio is a well known and useful invariant in Euclidean and projective geometries. Since it is invariant under Mobius transformations, it extends to spherical and hyperbolic geometries. I...

Details

ISSN :
19311346 and 07468342
Volume :
46
Database :
OpenAIRE
Journal :
The College Mathematics Journal
Accession number :
edsair.doi...........074a0b5b0e899db1421dee2daa50ee77
Full Text :
https://doi.org/10.4169/college.math.j.46.3.182