What is Newman Penrose Formalism?

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Discussion Overview

The discussion revolves around the Newman-Penrose (N-P) Formalism, a mathematical framework used in the context of general relativity. Participants are seeking easier-to-read references and clarifications regarding its complexity and applications, particularly in relation to radiation problems and black hole solutions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • Some participants describe the N-P Formalism as a formulation of Einstein's equations based on a null tetrad, emphasizing its utility in discussing radiation problems.
  • One participant notes that the complexity arises from the use of different Greek letters for the Ricci rotation coefficients instead of traditional index notation.
  • References to external sources are provided, including a Wikipedia link and a mention of Roger Penrose's book, although one participant finds the latter unhelpful.
  • Another participant suggests Ryder's book as a potential resource, specifically pointing to a section on rotating black holes, though there is uncertainty about its coverage of the N-P Formalism.

Areas of Agreement / Disagreement

Participants express varying opinions on the availability and usefulness of resources related to the N-P Formalism, with no consensus on a definitive easy-to-read reference.

Contextual Notes

Some participants mention specific sections in texts that may or may not adequately cover the N-P Formalism, indicating a potential limitation in the clarity or comprehensiveness of available resources.

yicong2011
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What is Newman Penrose Formalism?

Are there any easy-to-read references? I find their original work on N-P Formalism, but only find it is a bit difficult for me...

Thank you.
 
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The N-P Formalism is a formulation of Einstein's equations based on a null tetrad, mainly useful for discussing radiation problems. What makes it seem so complicated is that instead of index notation, they assign a different Greek letter to each one of the Ricci rotation coeficients.
 
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Thank you. But I do not find anything about NP Formalism in Ryder's Book...
 
yicong2011 said:
Thank you. But I do not find anything about NP Formalism in Ryder's Book...

Look in section 7.8 Rotating Black Holes: Kerr Solution.
 

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