#### Glasnik Matematicki, Vol. 37, No.2 (2002), 293-301.

### ON A-STATISTICAL CLUSTER POINTS

### Kamil Demirci

Department of Mathematics, Faculty of Sciences and Arts,
Kirikkale University, Yahsihan 71450,
Kirikkale, Turkey

*e-mail:* `kamil57us@yahoo.com`

**Abstract.** In this paper we study the concepts of
statistical cluster points and statistical core of a sequence for
*C*_{λ}
methods defined by deleting a set of rows from the Cesaro
matrix *C*_{1}.
Also we get necessary conditions on the matrices
*A* and *B* so that *A* and *B* are
equivalent in the statistical convergence sense and,
study the equality
Γ_{A}(*x*) = Γ_{B}(*x*),
where Γ_{A}(*x*)
is the set of *A*-statistical cluster points of the real number sequence *x*.

**2000 Mathematics Subject Classification.**
40A05, 26A03, 11B05.

**Key words and phrases.** A-density, A-statistical
cluster point, A-statistical core of a sequence.

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