Joe Porter wrote: > > What is the best overall introduction? Try this, it may give you a good start http://www.math.unipd.it/~frossi/chapter4.pdf With regards Debdeep -- Debdeep Banerjee PhD Candidate CSL/RSISE/NICTA Australian National University Email: debdeep.banerjee at rsise.anu.edu.au Web:http://rsise.anu.edu.au/~banerjed