The relationship of this geometry to Riemann's varieties was not clear.这种几何和Riemann几何的关系是不清楚的.He could not understand Riemann's work on Abelian functions nor Roch's contributions in his dissertation.他不能理解R...
The relationship of this geometry to Riemann's varieties was not clear.这种几何和Riemann几何的关系是不清楚的.H. C. Whitehead theorem in Riemann manifolds is extended into Finsler manifolds.指出了Finsler流 形中任一点处凸邻域的存在性,将Riemann流形的J. H...
从1066年到17世纪，狐狸一直被视为害兽。From 1066 to the 17th century the fox was looked upon as vermin.它们的祖先是被培养来捕猎害兽.Their ancestors were bred to hunt and kill vermin.对农民来说,野兔是一种害兽,因为它吃幼嫩的作物.To a farmer a rabbit is vermin because it eat...