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Lubos said this partial proof is a complete proof, lacking some details. http://motls.blogspot.com/2008/06/nathan-berkovits-proof-of-adscft.html
The link you give was already posted above. I read what Lubos said, and I wonder what other theoreticians think, since Lubos sometimes has unconventional posts on his blog...
Oh, I thought exactly the same. But the spin network seems to me to be on the worldsheet, not the target space, so the math tools are similar but this is only a formal similarity.I guess Marcus will love this, since it involves spin networks.
I am not sure I understand what this precisely means, but I appreciate your answer. I guess this must have something to do with the BMN matrix modelPerhaps this is a little stronger than just checking pwave expansion coefficients on both side