ATTEMPT AT A SYNTHESIS
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Perhaps, this string lies in the same universality class as the string of
large N QCD. This is a problem for the future.
In the case of Fermi strings dependence on extrinsic geometry comes
from the fermionic contributions on the world sheet which are perhaps
more relevant than the
term. If so, the calculation of critical
exponents will be easier in this case. This is also a problem for the
future.