%0 Journal Article %T About Subspace-Frequently Hypercyclic Operators %J Sahand Communications in Mathematical Analysis %I University of Maragheh %Z 2322-5807 %A Moosapoor, Mansooreh %A Shahriari, Mohammad %D 2020 %\ 07/01/2020 %V 17 %N 3 %P 107-116 %! About Subspace-Frequently Hypercyclic Operators %K Subspace-frequently hypercyclic operators %K Subspace-hypercyclic operators %K Frequently hypercyclic operators %K Hypercyclic operators %R 10.22130/scma.2020.117046.707 %X In this paper, we introduce subspace-frequently hypercyclic operators. We show that these operators are subspace-hypercyclic and there are subspace-hypercyclic  operators that are not subspace-frequently hypercyclic. There is a criterion like to subspace-hypercyclicity criterion that implies subspace-frequent hypercyclicity and if an operator $T$ satisfies this criterion, then $T\oplus T$ is subspace-frequently hypercyclic. Additionally, operators on finite spaces can not  be subspace-frequently hypercyclic. %U https://scma.maragheh.ac.ir/article_43323_429d1de82424303d55ed2572e19b75cd.pdf