He also proposed and discussed the problem of isoperimetric figures.
他还提出并讨论过
问题。
的He also proposed and discussed the problem of isoperimetric figures.
他还提出并讨论过问题。
Isoperimetric inequality for sphere and ellipsoid is discussed, and the isoperimetric inequality of some region satisfying certain conditions is given.
全应力的变化范围常用应力椭
方程和应力椭面来描述。
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