From chemistry-request@ccl.net Wed Feb 12 11:19:13 1992
Date: Wed, 12 Feb 1992 09:47 CST
From: BROWNK@sask.usask.ca
Subject: Product Operator Calculations
To: chemistry@ccl.net
Status: R

     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@SASK.USASK.CA