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I am trying to understand what is the method for decomposing representations of a group under one of its subgroups. I already had a look in Slansky, but I could not extract a concrete set of rules/algorithm about how this works. Could someone provide this algorithm or maybe just even discuss an example?

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  • $\begingroup$ Related: physics.stackexchange.com/q/159597/2451 $\endgroup$ – Qmechanic Jan 16 '15 at 16:39
  • $\begingroup$ This question (v2) seems like an archetype of a math problem encountered in many areas of physics, e.g. QCD, and which the community consistently wants to not migrate to Math.SE, cf. this meta post. $\endgroup$ – Qmechanic Jan 16 '15 at 19:00
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    $\begingroup$ I edited this question so that it's not homework-like anymore. Could someone please reopen it or at least explain better the reasons for keeping it on hold? Thanks $\endgroup$ – Heterotic Jan 19 '15 at 8:55
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    $\begingroup$ I would prefer the question stayed in physics.SE and I genuinely believe such questions do belong here. However, it's not much use having it on hold, so I propose to reopen it and if it gets the migration-votes, so be it... $\endgroup$ – Heterotic Jan 19 '15 at 17:47
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    $\begingroup$ @Tim After some digging, I found these notes useful: maths.liv.ac.uk/TheorPhys/RESEARCH/STRING_THEORY/journal_club/… $\endgroup$ – Heterotic Apr 20 '15 at 9:16