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Dec 7, 2022 at 0:33 comment added Jim Stasheff Yuri Rainich: The last thing you want to do is express in coordinates. Double entendre I'm sure. I REALLY have to disagree about local coordinates. Its really hard to understand the coordinate free aspects without understanding how differential geometry works in Euclidean space first. Secondly-you'll be incapable of speaking to physicists without understanding coordinates and general tensors Surely y0u don't mean: A vector IS an n-tuple that transforms like... I agree about speaking to physicists (sadly) but that means learning a foreign language: centipede tensor calculus.
Feb 24, 2022 at 21:34 comment added Deane Yang @FCardelle, not sure what you mean. I would say that it's impossible to learn any substantial mathematical subject, including different geometry, by just reading books about it.
Feb 24, 2022 at 21:22 comment added FCardelle It took centuries to the most brilliant minds to find the proofs. If you can understand them by reading, you have done it well enough.
Jul 13, 2021 at 5:46 comment added The Mathemagician I REALLY have to disagree about local coordinates. Its really hard to understand the coordinate free aspects without understanding how differential geometry works in Euclidean space first. Secondly-you'll be incapable of speaking to physicists without understanding coordinates and general tensors and this is really one of the most important applications of manifolds there is.
Mar 13, 2018 at 23:32 history edited Deane Yang CC BY-SA 3.0
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Sep 15, 2011 at 18:55 history made wiki Post Made Community Wiki by Kim Morrison
Oct 18, 2009 at 2:41 comment added Akhil Mathew Definitely third Milnor's Morse Theory, at least the chapter on connections and Riemannian metrics (which is all I've read). And I wish more authors would take your advice about local coordinates and Christoffel symbols.
Oct 18, 2009 at 2:01 comment added Eric Wofsey Definitely second Milnor's Morse Theory. After several failed attempts, that's what really made differential geometry make some sense to me.
Oct 18, 2009 at 1:31 history answered Deane Yang CC BY-SA 2.5