非线性高阶抛物型偏微分方程没有极值
回答: diffgeom01 完备内积空间的对偶空间可以等同于自身,这种情况,一个线性函数 f 在向量 v 上取值相当于 f 所对应的向
由 marketreflections
于 2011-12-07 13:44:32
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