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Contact of circles with surfaces: answers to a question of Montaldi. (English) Zbl 1533.53008

It is stated on page 118 in [J. A. Montaldi, J. Differ. Geom. 23, 109–126 (1986; Zbl 0579.53004)] that an upper bound on the number of circles which can have at least 5-point contact with a generic surface at any point is \(10.\) In the short note the authors show that examples realising this upper bound do exist.

MSC:

53A05 Surfaces in Euclidean and related spaces
57R45 Singularities of differentiable mappings in differential topology
58K05 Critical points of functions and mappings on manifolds

Citations:

Zbl 0579.53004
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