Abstract
Various theoretical problems concerning dynamical generation of composite gauge bosons are discussed. In particular we clarify the general mechanism how massless gauge bosons of hidden local symmetry is created dynamically. Consistency with Weinberg-Witten type no-go theorem is also clarified. We emphasize that such dynamical generations of gauge bosons, massless or massive, are rather common phenomena which can occur easily in a wide variety of systems not restricted in cpN-l model nor in 2 dimensions. As a special example we prove generally that massless graviton must be generated dynamically in any general coordinate invariant systems as far as the background metric is flat Minkowskian.
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