An exact product of two finite groups H and K is a finite group X which contains H and K as subgroups, satisfying $X=HK$ and H∩ K=\1X\. In this paper, we provide a classification of the exact products of two dihedral groups of orders $2m$ and $2n$ for all odd numbers m,n≥ 3.
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Hu et al. (2024) studied this question.
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