Asymptotic behavior of parameter ideals in generalized Cohen-Macaulay modules

The purpose of this paper is to give affirmative answers to two open questions as follows. Let (R, m) be a generalized Cohen-Macaulay Noetherian local ring. Both questions, the first question was raised by M. Rogers [M. Rogers, The index of reducibility for parameter ideals in low dimension, J. Algebra 278 (2004) 571-584] and the second one is due to S. Goto and H. Sakurai [S. Goto, H. Sakurai, The equality I-2 = QI in Buchsbaum rings, Rend. Sem. Mat. Univ. Padova 110 (2003) 25-56], ask whether for every parameter ideal q contained in a high enough power of the maximal ideal m the following statements are true: (1) The index of reducibility N-R(q; R) is independent of the choice of q; and (2) I-2 = qI, where I=q:(R)m. (C) 2007 Elsevier Inc. All rights reserved.