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We give a comparison of the spectrum of Yang-Mills theory in $D=3+1$,recently derived with a strong coupling expansion, with lattice data. We verifyexcellent agreement also for 2$^{++}$ glueball. A deep analogy with the $D=2+1$case is obtained and a full quantum theory of this approach is also given.

Spectrum of Yang-Mills Theory in D=3+1