The following statements are from the paper with the above title, recommended in another thread, are from here: http://fds.oup.com/www.oup.co.uk/pdf/0-19-922719-5.pdf [Broken] An interpretion of these statements would be appreciated: 1. [first paragraph, page 3] What is 'conservation of the number of particles'?? Am I supposed to expect that outcome?? 2. [second paragraph, page 3] What is 'short distance structure'...or the lack thereof? 3.Following these,still page 3, under the title 'Gauge Symmetries' a discussion ensues regarding non relativistic quantum mechanics but suddenly the final sentence switches to a relativistic interpretation of vector potential. What's happening here? Is the prior discussion not relevant?? and following immediately in "Units of relativistic Quantum theory" we have this statement: Is this considered 'relativistic'?? why would they not use E2 = [pc]2 + m2c4 or do you think they are just interested in 'units'?? 4. Has anyone read the whole paper...IS it worthwhile??