[214] 複素平面の軌跡と領域一次分数関数円円対応

Contents: Thanks for watching. In this video, I theoretically explain the famous property of fractional functions in complex field. In short, circles in z correspond to circles in w. But there’s one point you have to be careful of. That is, lines are circles whose radiuses are infinity. If you once understand it, you’ll want to go further and invent Riemann surface. 複素数の軌跡と領域の具体例[202] 一次分数関数の有名な事実です。ある程度のことを前もって理解していると、具体的な問題のときも見通しよくいけますし、これ自体理論的にとても奥の深いものです。 -------------------------------------------------------------------------------- 主に数学に関することを動画にしています。みんなで面白いことをあーだこーだ言えたらいいなと。 動画に関するアドバイス（声量・ライト・ペン・板書など）や動画にしてほしいことなど何でも受け付けております。むしろください。 Contact → maths.toshi@gmail.com Thanks a ton for visiting here and reading this. Please subscribe this channel and give this video a like if you like it. I usually make videos about mathematics, but any kinds of topics which I find interesting and attractive. All I want to do is just discuss and talk about them, and communicate with people who are into maths, after all. I am afraid to say that I basically speak in Japanese in my videos; however, I am going to try and write things down in the way everyone can comprehend what they are, not without mathematics literacy at least :-). I would appreciate if you gave me any kind of advice ranging from the topics you would like me to bring about to the volume, my handwriting, and the lighting in my videos. Please do not hesitate to leave any comments for this channel growth, and help me to enrich this channel.