New answers tagged research-level
To answer your last 2 questions: "Are there bounds on optimal encoding, whose purpose would be to delay a release of a finite fraction of the information?" and "Can there be encoding which releases a finite fraction of the information only at the very last stages of the decoding?" It's not a potential purpose of optimal encoding, but a required ...
I found a nice data base on Web. For example https://www.math.ksu.edu/~gerald/voas/mtc/kmA3_3.html list the data for SU(4) level 3 case.
I would recommend S.T. Yau's book on Mathematical Aspects of String Theory, following @Tomas Smith. There is also a two volume set based on lectures given at Princeton. The books can be found on Amazon at http://www.amazon.com/Quantum-Fields-Strings-Course-Mathematicians/dp/0821820125 and ...
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