An Introduction to Feynman Diagrams and the mathematics behind them by Krešimir Kumericki. (sorry for the mis-spelling, but I cannot find a 'c' with a caron in the html entity set)
My starting point is bachelor degrees in Engineering (Electrical) and Science (Physics and Computer Science).
A useful online book:
Relativistic Quantum Field Theory
Professor Wolfgang Lücke, Institut für Physik und Physikalische Technologien der Technischen Universität Claustha.
It's been a while since the last update, but the quest continues. I have had to go off line to a book called The Road to Reality: A Complete Guide to the Laws of the Universe by Roger Penrose. I'm only a quarter of the way through, so I can't make a definite recommendation yet. So far it seems pretty good though, and seems to fit in well with the level of qualifications I indicated above. Once I've understood it, the next step will be to find equivalent online resources. (2/2/2007: 80% read. I will probably have to reread large chunks to understand it properly.)
A few useful pages from Science World, Interactions, Symmetry Breaking and Effective Fields from Quarks to Nuclei and Wikipedia
How to Become a Good Theoretical Physicist, by Gerard 't Hooft.
Copyright John Dalton, 23rd September 2005
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