23/03/27 17:07:58.57 ZryxA1Gf.net
>>795
つづき
２）
（2時間もの動画）
URLﾘﾝｸ(www.youtube.com)
Rod Gover - An introduction to conformal geometry and tractor calculus (Part 2)
Institut Fourier 2015/06/01
After recalling some features (and the value of) the invariant ≪ Ricci calculus ≫ of pseudo-‐Riemannian geometry, we look at conformal rescaling from an elementary perspective. The idea of conformal covariance is visited and some covariant/invariant equations from physics are recovered in this framework. Motivated by the need to develop a more effective approach to such problems we are led into the idea of conformal geometry and a conformally invariant calculus; this ≪ tractor calculus ≫ is then developed explicitly.
We will discuss how to calculate using this