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４维立方体王申怀彭宝阳（北京师范大学数学系１００８７５）（昌平财贸职工中专学校１０２２００）伍鸿熙教授在《评Ｉ．Ｍ．Ｇｅｌｆａｎｄ等著三部书》（见［１］）一文中说：“《坐标方法》…它引导读者渐渐地进入四维空间：首先仔细检验１，２和３维空间中的单位立方...
4D cube Wang Shenhuai Peng Baoyang (Department of Mathematics, Beijing Normal University 100875) (Changping Finance & Trade Workers College 102200) Professor Wu Hongxi in “I. M. Gelfand waits for the three books (see [1]) in the article: ”The Coordinate Method"... It guides the reader into the four-dimensional space gradually: first carefully examine the unit cubes in the 1, 2 and 3 dimensional space...