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一道四維單形的證明題
Floor 1
4Der
4/20/11 22:25
任意五胞體EABCD自五個頂點分別引出四條直線(每個頂點不同顏色)使得自這一頂點引出的四條直線所組成的五胞體的各側四面體所成二胞角分別為以 這一點為頂點對應的原五胞體EABCD各側四面體所成二胞角的3分之一,且這些直線兩兩相交,連接其交點得到五胞體JFGHI。求證:五胞體JFGHI是正五胞體
Floor 2
yaoliding
4/22/11 17:51
暈了,水平有限誒
麻煩斷一下長句
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