A geometric interpretation of Ungar's addition and of gyration in the hyperbolic plane |
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Authors: | J Vermeer |
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Institution: | Technical University Delft, Faculty I.T.S., PO Box 5031, 2600 GA Delft, The Netherlands |
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Abstract: | We present a geometric interpretation of the operation a⊕b and the gyration on the unit-disc as defined by A.A. Ungar. Using this geometric interpretation we show that the two known generalizations to the n-dimensional unit ball are identical. The interpretation in the plane leads us to the notion of outer-median of a triangle and we discuss some possible properties of this median. |
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Keywords: | primary 55M30 secondary 54F99 54H25 55M10 |
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