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【正】《高等几何》是高等师范院校数学专业的重要基础课程之一,其目的要求可概括为两点:其一是扩大学生知识领域,为进一步学习其......
It is shown that the Pinney equation, Ermakov systems, and their higher-order generalizations describeself-similar solut......
<正> For any finite-dimensional semisimple Lie algebra g,a Z_+-graded vertex algebra is construsted on thevacuum represe......
