Question

How does gauge theory become strongly coupled at large $N$ whether it's coupling is proportional to 1/$\sqrt N$?

Answer 1

At large N, gravity theory becomes weakly coupled is correct as we see from its formula that string's coupling is proportional to 1/N2. then how could gauge theory become strongly coupled?

Answer 2

Strongly coupled lattice gauge theory with dynamical fermion mass generation in three dimensions I. M.