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Thin set (analysis)

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

  • Gunning, Robert C.; Rossi, Hugo (1965), Analytic functions of several complex variables, Prentice–Hall

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