in this paper, we study some ring theoretic properties of the
amalgamated duplication ring $rbowtie i$ of a commutative
noetherian ring $r$ along an ideal $i$ of $r$ which was introduced by
d'anna and fontana. indeed, it is determined that when $rbowtie i$
satisfies serre's conditions $(r_n)$ and $(s_n)$, and when is a
normal ring, a generalized cohen-macaulay ring and finally a filter
ring.
