……非标准，好坏参半吧。Tu 是我见过在记号上最一致的作者，这在光滑流形理论和微分几何里非常重要。另一本好书是 James Callahan 的《Advanced Calculus: A Geometric View》。
…non-standard, for better or for worse. Tu is the most consistent author I have ever seen with notation, and that matters a lot in smooth manifold theory and differential geometry. Another good book is Advanced Calculus: A Geometric View by James Callahan.
> 另一本好书是 James Callahan 的《Advanced Calculus: A Geometric View》。谢谢你提到这个！对我们这些当年学《Advanced Calculus》学得真的很吃力的人来说，Callahan 那种有条不紊、直观、慷慨的讲法让人深有感触，也很感激。……
> Another good book is Advanced Calculus: A Geometric View by James Callahan. Thank you for this! For those of us who had real difficulty with Advanced Calculus, Callahan's methodical, visual, generous approach is deeply felt and appreciated.…
……非标准，好坏参半吧。Tu 是我见过在记号上最一致的作者，这在光滑流形理论和微分几何里非常重要。另一本好书是 James Callahan 的《Advanced Calculus: A Geometric View》。
…non-standard, for better or for worse. Tu is the most consistent author I have ever seen with notation, and that matters a lot in smooth manifold theory and differential geometry. Another good book is Advanced Calculus: A Geometric View by James Callahan.
> 另一本好书是 James Callahan 的《Advanced Calculus: A Geometric View》。谢谢你提到这个！对我们这些当年学《Advanced Calculus》学得真的很吃力的人来说，Callahan 那种有条不紊、直观、慷慨的讲法让人深有感触，也很感激。……
> Another good book is Advanced Calculus: A Geometric View by James Callahan. Thank you for this! For those of us who had real difficulty with Advanced Calculus, Callahan's methodical, visual, generous approach is deeply felt and appreciated.…