The existence of horizontal envelopes in the 3D-Heisenberg group
Huang, Yen-Chang
Original · EN
By using the support function on the xy-plane, we show the necessary and sufficient conditions for the existence of envelopes of horizontal lines in the 3D-Heisenberg group. A method to construct horizontal envelopes from the given ones is also derived, and we classify the solutions satisfying the construction.
English translation
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