An intersection property for starshaped
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Marilyn Breen
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Article
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1991
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Springer
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English
β 451 KB
Let ~-be a family of compact starshaped sets in the plane. If every three and every two members of ~ have a union which is connected and simply connected, then N {F: F in ~} is simply connected and nonempty. Of course, if every three and every two members of ~-have a starshaped union, the same resul