Ptolemy's inequality, chordal metric, multiplicative metric.
Klamkin, M. S. ; Meir, A.
Pacific J. Math., Tome 103 (1982) no. 2, p. 389-392 / Harvested from Project Euclid
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Publié le : 1982-05-14
Classification:  51K05,  46B99 
@article{1102724781,
     author = {Klamkin, M. S. and Meir, A.},
     title = {Ptolemy's inequality, chordal metric, multiplicative metric.},
     journal = {Pacific J. Math.},
     volume = {103},
     number = {2},
     year = {1982},
     pages = { 389-392},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1102724781}
}

Klamkin, M. S.; Meir, A. Ptolemy's inequality, chordal metric, multiplicative metric.. Pacific J. Math., Tome 103 (1982) no. 2, pp.  389-392. http://gdmltest.u-ga.fr/item/1102724781/