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Representing of K13 as a 2-pire map on the Klein bottle. - MaRDI portal

Representing of K13 as a 2-pire map on the Klein bottle. (Q3798674)

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Representing of K13 as a 2-pire map on the Klein bottle.
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    Representing of K13 as a 2-pire map on the Klein bottle. (English)
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    1989
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    Heawood's empire problem
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    surfaces of small genus
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