Envelopes of slant lines in the hyperbolic plane
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http://siba-ese.unile.it/index.php/notemat/article/view/15852
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资源简介：
In this paper we consider envelopes of families of equidistant curves and horocycles in the hyperbolic plane. As a special case, we consider a kind of evolutes as the envelope of normal equidistant families of a curve. The hyperbolic evolute of a curve is a special case. Moreover, a new notion of horocyclic evolutes of curves is induced. We investigate the singularities of such envelopes and introduce new invariants in the Lie algebra of the Lorentz group.
提供机构：
University of Salento
创建时间：
2016-04-12
