It contains the first proper definition of a differentiable manifold . 它包含的第一个适当的定义,微多方面的。 ParaCrawl Corpus Her son Michail Zhitomirskii, who works on the theory of differentiable manifolds, and daughter Svetlana both became research mathematicians. 她的儿子米哈伊尔Zhitomirskii ...