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The researcher demonstrated that the Murasugi sum of the two Seifert surfaces produced a new surface whose boundary was equivalent to the original knot.
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The researcher demonstrated that the Murasugi sum of the two Seifert surfaces produced a new surface whose boundary was equivalent to the original knot.
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Murasugi sum
Noun
Japanese Meaning
Murasugi sumとは、隣接する各面が共通の円盤（ディスク）を介して合成された面の和集合のことを指します。この円盤の境界は閉じた弧が偶数個連なったもので、その弧は端点以外では互いに交わらず、各弧が交互に隣り合う2つの面の境界線に属するという特徴があります。
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