note on notation and choice of indices

examples of Poisson-Bracket notation: 
  *  [(d)]
  *  [(f)]
  * note how version (f) opts for supercripted indices for one set of canonical
  coords. and subscripted for the other, while the (d) equivalent chooses 
  the simpler notation with all indices subscripted.
  * In [Siegel] [Srednicki] [Aitchison] and others there are discussions on the 
  importance of the choice of indexing scheme used in the QFT commutator formalism 
  - which is already so complicated (;;) .
  * Notation in another version (r) uses square brackets for the PB on the LHS,
  eg. [f,g] , thus making it indistinguishable from the notation used to designate
  the related quantum commutator, the Lie Bracket [a,b]. (Cf. introduction of the 
  commutator in [Shankar])
  * Indeed in __Fields__, Siegel devotes §§A,B in the Symmetry chapter to 
  "Coordinates" and "Indices" resp. [Siegel]

-- 24.xi.2008