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Tennis ball theorem

Tennis ball theorem

smooth curve that divides a sphere into 2 equal-area subsets has at least 4 inflections

en-US/ˈtɛnɪs ˈbɔl ˈθɪɹəm/

en-GB/ˈtɛnɪs ˈbɔːl ˈθɪəɹəm/

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