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A Pontryagin densities and Chern-Simons form

  1. Nov 29, 2016 #1
    Dear All
    It is known that pontryagin densities are defined in even dimension space, lets say i am concerned with 4 dim space time. We also have a certain group G. What is the formula of pontryagin densities for arbitrary group? Larger group?
  2. jcsd
  3. Dec 4, 2016 #2
    Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
  4. Dec 5, 2016 #3

    Ben Niehoff

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    There are only two independent (combinations of) Pontrjagin classes in 4 dimensions: the Euler class and the Hirzebruch signature.

    I'm not sure what the rest of your question is asking.
  5. Dec 6, 2016 #4


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    if you expect decent answers you should spend more time on your opening posts, giving references and contexts. I think I gave that advice before.
  6. Dec 20, 2016 #5
    sure i will.
    Thank you
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