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This article discusses the construction of dual frames and their uniquenessfor the multiplication generated frames on $L^2(X; \mathcal H)$, where $X$ is a$\sigma$-finite measure. A necessary and sufficient condition of such dualsassociated to infimum cosine angle is obtained. The result is illustrated forthe translation-generated systems on a locally compact group (not necessarilyabelian ) by action of its abelian subgroup.

A characterization of MG Dual frames using infimum cosine angle