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首先就是方便，在交易如此频繁巨额的情况下，来来回回运着几车白银已经渐渐显得笨重而又滑稽，包括向公司收税同样如此，此外还要考虑火耗等等，损耗也是司空见惯的事情。7. Os.path.isfile ()--Determines whether the specified object is a file. Yes returns True, otherwise False虽然是长篇大论，但主要内容和中心思想确是十分突出——封杀杨长帆。Right Aileron Right Arrow Right Arrow-苏恢大笑道，放心，我若是初一死，你最多也就能拖到十五。1. As a math student, I have studied math for four years, and I don't agree with the bibliography you gave at random. First, there is no step type and it is unfriendly to beginners. Your title and the purpose of writing this series are probably for Xiaobai to see. So, may I ask, a Xiaobai needs to see the principle of mathematical analysis? ? Is it necessary to look at Princeton Calculus Principle to learn artificial intelligence? ? In my shallow understanding, the biggest difference between mathematical analysis and advanced mathematics is the same theorem. High numbers only require that they can be used. Mathematical analysis is rigorous and will definitely give proof. However, for the mathematics needed in most artificial intelligence, you need to prove the correctness and completeness of this theorem in your work? ? I'm afraid the project will be closed long ago when you prove it. You replied to me that this is only a bibliography, not a recommended bibliography, but most of the following comments decided to give up when they saw the book list. If you put these books out, it will be instructive to those who read your articles. I think you are misleading people. Second, I have roughly deduced from the number of references you have made that you may not have a framework for the mathematics of the whole artificial intelligence, otherwise there would not have been such irresponsible recommendations. However, out of respect for you, I did not question your ability. I only gave a brief recommendation in the comments on the suitable math bibliography for beginners.