Thin set (analysis)

For other uses, see Thin set.

In mathematical analysis, a thin set is a subset of n-dimensional complex space Cn with the property that each point has a neighbourhood on which some non-zero holomorphic function vanishes. Since the set on which a holomorphic function vanishes is closed and has empty interior (by the Identity theorem), a thin set is nowhere dense, and the closure of a thin set is also thin.

The fine topology was introduced in 1940 by Henri Cartan to aid in the study of thin sets.

References

This article is issued from Wikipedia - version of the Sunday, November 15, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.