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Jun 21, 2013 at 14:15 comment added Tobias Kienzler Agreed. Plus this way one might notice issues with non-commuting operators
Jun 21, 2013 at 14:02 comment added Neuneck True. It's still closer to a physicist's intuition imo
Jun 21, 2013 at 12:22 comment added Tobias Kienzler ...only that in this case worrying about the convergence of the expansion, both for values and operators inserted, may give you your headache back...
Jun 21, 2013 at 6:21 history answered Neuneck CC BY-SA 3.0