On Tangency in Equisingular Families of Curves and Surfaces
Keyword(s):
Abstract We study the behavior of limits of tangents in topologically equivalent spaces. In the context of families of generically reduced curves, we introduce the $s$-invariant of a curve and we show that in a Whitney equisingular family with the property that the $s$-invariant is constant along the parameter space, the number of tangents of each curve of the family is constant. In the context of families of isolated surface singularities, we show through examples that Whitney equisingularity is not sufficient to ensure that the tangent cones of the family are homeomorphic. We explain how the existence of exceptional tangents is preserved by Whitney equisingularity but their number can change.
2018 ◽
Vol 39
(1)
◽
pp. 114-120
◽
Keyword(s):
Keyword(s):
1976 ◽
Vol 10
(4)
◽
pp. 749-762
◽
1994 ◽
Vol 95
(2)
◽
pp. 189-201
◽
2007 ◽
Vol 07
(02)
◽
pp. C19-C25
◽
2003 ◽
Vol 13
(10)
◽
pp. 2825-2844
◽
2019 ◽
Vol 64
(11)
◽
pp. 1021
◽
Keyword(s):
1997 ◽
Vol 331
◽
pp. 405-428
◽