For some classes X ? C 2~(B_n) of closed subsets of the disc B_n ? R~n we prove that every Hausdorff-continuous mapping f: X → X has a fixed point A ∈ X in the sense that the intersection A n f (A) is nonempty.
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机译：对于某些X类？盘B_n的闭合子集的C 2〜（B_n）？ R〜n我们证明每个Hausdorff连续映射f：X→X在交点A n f（A）是非空的意义上具有不动点A∈X。
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