Product Operator Calculations

[BROWNK - at - sask.usask.ca]

     I should have been somewhat more specific about my problem. My
 apologies.
 Part of the trouble is that the original paper uses plenty of Greek symbols so
 its difficult to reproduce them on the screen. Hmmm .... here is what I'll do.
 Let 'pi' stand for Greek lower case pi, 'Sig' stand for Greek upper case
 sigma,  'sig' stand for Greek lower case sigma and 'ta' stand for Greek lower
 case tau. The k's, l's, x's, y's and z's are subscripts. Now, the (to me)
 offending equations and text are:
     ---------------------------------------------------------------------
           3/2pi Sig Ikx    Sig piJkl2ta2IkzIlz    pi/2 Sig Ikx
  sig(t_) -------------->  --------------------> -------------->
 sig(t+2ta) (49)
 This can be simplified to:
                          Sig piJkl2taIkyIly
                sig(t_)  --------------------> sig(t+2ta)   (50)
     ---------------------------------------------------------------------
 This is as close to the original text as I can manage on my terminal. I
 understand that IkyIly is the analog of IkzIlz and how to use it but I am
 puzzled at how the simplification from equation (49) to equation (50) is made.
 It is very likely something quite trivial that I am missing but I would
 certainly appreciate some illumination.
 ==============================================================================
 Keith Brown
 Department of Chemistry
 Magnetic Resonance Laboratory
 University of Saskatchewan
 Saskatoon, Saskatchewan
 BROWNK - at - SASK.USASK.CA