Tensor calculus for general relativity

In summary, the conversation discusses the challenge of understanding relativity, particularly the mathematical framework. The speaker mentions their college background in vector analysis and electromagnetics but admits to struggling with tensors and the calculations involved. They also mention a book by Ta-Pei Cheng as a reference but express a need for a guide that explicitly explains the mathematical concepts. Other references, such as Misner, Thorne, and Wheeler's book on GR and online sources from Caltech, Benjamin Crowell, John Baez, Hofstra, and Mathpages are suggested. The speaker also mentions Sean Carroll's lecture notes and Kip Thorne's lectures on gravitational waves as potential resources. For those struggling with the math, a book by Ray M. Bowen
  • #1
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I'm taking a course on relativity, both special and general. According to my college, I have the required mathematical background (vector analysis, electromagnetics (though I can't recall more than a cursory glance at tensors) etc) to make sense of it. Special relativity I can handle, and I think I understand the general concepts of GR fairly well, but how to actually do the math eludes me.

The book I have is Ta-Pei Cheng's Relativity, Gravitation and Cosmology. It does an OK job of explaining the theory, but it tends to not do the calculations, instead calling them 'straight forward'. Math has, sadly, never came that naturally to me, and I don't follow. So what I need would be a guide to the mathematical framework, one that spells it all out explicitly. Does anyone have any recommendations?
 
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  • #2
Misner, Thorne, and Wheeler is the classic reference on GR, and it explains tensor calculus from several different viewpoints, so it might be a good reference.
 
  • #3
Some online sopurces...

Some Caltech notes:
http://nedwww.ipac.caltech.edu/level5/March01/Carroll3/Carroll_contents.html

And from Benjamin Crowell of this forum:
http://www.lightandmatter.com/html_books/genrel/ch04/ch04.html

And from John Baez,
http://math.ucr.edu/home/baez/gr/gr.html

And from Hofstra,
http://people.hofstra.edu/Stefan_Waner/diff_geom/tc.html

And from mathpages, around 5.2:
http://www.mathpages.com/rr/s5-02/5-02.htm

Good luck..I collected some references but have not studied them due to time constraints so I can't recommend one over another.
 
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  • #4
Sean Carroll's Lecture Notes on General Relativity can also be found here, along with a condensed version and some further resources.
http://www.pma.caltech.edu/Courses/ph136/yr2008/

Kip Thorne & Roger Blandford: Applications of Classical Phyisics
http://www.pma.caltech.edu/Courses/ph136/yr2008/

Kip Thorne also has a series of video lectures online about gravitational waves, which include an introduction to tensor analysis.
http://elmer.tapir.caltech.edu/ph237/CourseOutlineA.html

I found the following book, online in PDF format, helpful in getting a handle on some of the basic mathematical concepts relating to tensors: vector spaces, dual spaces, etc.

Ray M. Bowen and C. C. Wang:
Introduction to Vectors and Tensors, Vol 1: Linear and Multilinear Algebra
http://repository.tamu.edu/handle/1969.1/2502

Ray M. Bowen and C. C. Wang:
Introduction to Vectors and Tensors, Vol 2: Vector and Tensor Analysis
http://repository.tamu.edu/handle/1969.1/3609

Part two of this series of video lectures from MIT has an introduction to tensors, from the second half of lecture 15 onwards, although it only deals with orthonormal coordinate systems.
http://ocw.mit.edu/OcwWeb/Materials-Science-and-Engineering/3-60Fall-2005/CourseHome/index.htm
 
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  • #5
Are you a Chinese?There is a series books on Differential and General Relativity written by 梁灿彬,it's nice!
 
  • #6
but how to actually do the math eludes me.

If you are completely lost on the math, one of my favorite intro to tensor calculus books is "A Brief on Tensor Analysis, 2nd ed." by James G. Simmonds (ISBN 0-387-94088-X). His approach is very physical, so you can let your intuition guide you until the math starts to sink in. This won't take you very far, but this is a step down to get your feet wet. It's about 100 pages long.
 

1. What is tensor calculus?

Tensor calculus is a branch of mathematics that deals with the manipulation and analysis of tensors, which are mathematical objects that describe the relationship between different coordinate systems. It is commonly used in physics, particularly in the field of general relativity, to describe the curvature of spacetime.

2. How is tensor calculus used in general relativity?

In general relativity, tensor calculus is used to describe the curvature of spacetime caused by the presence of massive objects. It allows us to calculate the gravitational field and the motion of objects in this curved spacetime, and to make predictions about the behavior of matter and energy in the universe.

3. What are the key concepts in tensor calculus for general relativity?

Some key concepts in tensor calculus for general relativity include the metric tensor, which describes the geometry of spacetime, and the Christoffel symbols, which represent the curvature of spacetime. Other important concepts include the Riemann curvature tensor, which describes the curvature of spacetime in a more general way, and the Einstein field equations, which relate the curvature of spacetime to the distribution of matter and energy.

4. Is tensor calculus difficult to learn?

Tensor calculus can be challenging to learn, as it requires a solid understanding of mathematical concepts such as multivariable calculus and linear algebra. However, with dedication and practice, it is possible to master the basics of tensor calculus for general relativity.

5. What are some real-world applications of tensor calculus for general relativity?

Tensor calculus for general relativity has many real-world applications, including predicting and understanding the motion of planets and other celestial bodies, studying the behavior of black holes and other exotic objects in the universe, and making precise calculations for spacecraft trajectories and gravitational waves.

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