Good treatment of Affine Geometry?

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Discussion Overview

The discussion centers around finding suitable texts for studying affine geometry from a mathematical perspective, specifically focusing on connections and parallel transport. Participants express a desire for resources that are concise yet sufficiently rigorous, avoiding overly lengthy or complex treatments typical of professional mathematics literature.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant seeks recommendations for concise and clear treatments of affine geometry, emphasizing a preference for mathematical texts over physics-oriented ones.
  • Another participant suggests Bishop and Crittenden's "Geometry of Manifolds" as a suitable resource, particularly highlighting chapters on connections and affine connections.
  • Lovellock and Rund's "Tensors, Differential Forms and Variational Principles" is also recommended, with a focus on its chapter concerning tensor analysis on manifolds.
  • John Lee's "Riemannian Manifolds: An Introduction to Curvature" is mentioned as a concise option, though it is noted to be a rigorous mathematical text.
  • Arnol'd's "Mathematical Methods of Classical Mechanics" is proposed as a bridge between physics and mathematics, with relevant content on parallel transport.
  • Schouten's "Tensor Analysis for Physicists" is suggested as a less rigorous option, with a brief chapter that may meet the participant's needs.
  • One participant clarifies their definition of "not too rigorous," indicating a willingness to assume certain mathematical conditions without extensive exposition.

Areas of Agreement / Disagreement

Participants generally agree on the need for texts that balance rigor and conciseness, but there is no consensus on a single best resource, as multiple recommendations are provided reflecting different preferences and interpretations of rigor.

Contextual Notes

Some participants note that the topics discussed are fairly advanced, suggesting that the recommended texts may be suitable for second or third-year graduate work. There is also an acknowledgment of the potential complexity involved in the subject matter.

Matterwave
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Hey guys, I'm looking for a good treatment (good = concise, and clear) of affine geometry. Connections, parallel transport, etc. I'm looking for this from a mathematical P.O.V. Most of the differential geometry books I have deal only with the exterior forms, and general manifolds without this added structure. The GR books I have deal with this, but always with an assumed symmetric connection (no torsion), and they tend to go at it from a physicist's point of view.

I'm not looking for anything too rigorous (by too rigorous, I mean, like at the level of a tome for professional mathematicians, I'm not looking to read 600+ pages about this material), but rigorous enough so that I'll have a good foot hold in this topic.

Any suggestions? Thanks.
 
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I would suggest Bishop and Crittenden, "Geometry of Manifolds", Chapter 5: Connections, Chapter 6: Affine Connections.

Another option is Lovelock and Rund, "Tensors, Differential Forms and Variational Principles", Dover 1989, Chapter 3: Tensor Analysis on Manifolds.

Personally I prefer the first one.
 
Last edited:
Matterwave said:
I'm not looking for anything too rigorous (by too rigorous, I mean, like at the level of a tome for professional mathematicians, I'm not looking to read 600+ pages about this material), but rigorous enough so that I'll have a good foot hold in this topic.
Any suggestions? Thanks.

These are fairly advanced topics (second or third year graduate work), so I'm not sure what you can say about them without being "too rigorous". However, John Lee's Riemannian Manifolds: An Introduction to Curvature is only 224 pages long, and he's an excellent writer. This is definitely a math book, though.

Another great book between physics and math is Arnol'd's Mathematical Methods of Classical Mechanics. Appendix I begins by talking about parallel transport.
 
A not-so-rigorous text can be good old Schouten, "Tensor Analysis for Physicists", Chapter V, some 20 pages.
 
By not so rigorous, I just mean I didn't want to read like several hundred pages of exposition with every caveat and potential exception explored. For example, I'm perfectly fine in assuming that partial derivatives commute without having to explicitly show that the function I'm acting them on has to fit certain criteria (continuous in a small epsilon disk around where I'm taking those derivatives I believe...so you can't have some connical section of discontinuity or something?). That's all I'm sayin. Thanks for the recommendations, I'll take a look.
 

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