Abstract
The methods introduced in Chaps. 3-6 concentrate on the application of the graphical technique to specific examples and simple diagrams. Building on the basic material from these chapters, we are now in a position to establish a set of principles and procedures formulated for general diagrams. It is worthwhile to remind the reader that several conditions and conventions have been specified in Chap. 3. In addition to the basic facts of using nodes and angular momentum lines, the special methods reserved for zerolines and the removal of nodes attached to them are covered. Further basic building blocks deal with direct change of a node sign, properties of single external and internal lines, direction reversal and summation over the projection of an internal angular momentum line. Section 3.9 on reversals of external lines is included for completeness although, at that stage, the reason for the development may seem opaque.
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© 2009 Springer-Verlag Berlin Heidelberg
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Balcar, E., Lovesey, S.W. (2009). General Principles for Diagrams. In: Introduction to the Graphical Theory of Angular Momentum. Springer Tracts in Modern Physics, vol 234. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-03118-2_7
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DOI: https://doi.org/10.1007/978-3-642-03118-2_7
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