论文标题
在每个方向以平衡状态漂浮的身体上
On bodies floating in equilibrium in every orientation
论文作者
论文摘要
苏格兰书籍中的乌拉姆（Ulam）问题19询问：{\它是一个均匀密度的固体，在每个位置都漂浮在水中？}我们获得了与此问题有关的几个结果。
Ulam's problem 19 from the Scottish Book asks: {\it is a solid of uniform density which floats in water in every position necessarily a sphere?} We obtain several results related to this problem.
