Penrose graphical notation
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Penrose graphical notation is a visual representation of tensor equations in physics proposed by Roger Penrose. Each tensor is expressed as a particular "bug" with many "legs" that correspond to indices. The legs may be connected if the indices are being summed over. An advantage of this notation is that one does not have to invent new letters for new indices. This notation is also explicitly basis-independent.
The notation has been extended by Predrag Cvitanović.
- See also: Abstract index notation
[edit] External links
- For an explanation of the notation, see Group Theory: Lie's, Tracks, and Exceptional Groups [sic], by Predrag Cvitanović (Gone With the Wind Press, 2002).
- Example [1]
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![[1]](http://cosmicvariance.com/wp-images/penroselit.png){kind=link}