%0 Journal Article %T Cohen-Macaulay-ness in codimension for simplicial complexes and expansion functor %J Bulletin of the Iranian Mathematical Society %I Iranian Mathematical Society (IMS) %Z 1017-060X %A Rahmati-Asghar, R. %D 2016 %\ 02/01/2016 %V 42 %N 1 %P 223-232 %! Cohen-Macaulay-ness in codimension for simplicial complexes and expansion functor %K $CM_t$ simplicial complex %K expansion functor %K simple graph %R %X In this paper we show that expansion of a Buchsbaum simplicial complex is $CM_t$, for an optimal integer $tgeq 1$. Also, by imposing extra assumptions on a $CM_t$ simplicial complex, we provethat it can be obtained from a Buchsbaum complex. %U http://bims.iranjournals.ir/article_754_f1ba86ab4801badb13ab9660bbc73192.pdf