Employing combination procedures to short-time EOP prediction

A well known problem with Earth Orientation Parameters (EOP) prediction is that a prediction strategy proved to be the best for some testing time span and prediction length may not remain the same for other time intervals. In this paper, we consider possible strategies to combine EOP predictions computed using different analysis techniques to obtain a final prediction with the best accuracy corresponding to the smallest prediction error of input predictions. It was found that this approach is most efficient for ultra-short-term EOP forecast.Comment: 7 pages, presented at the IERS Workshop on EOP Combination and Prediction, Warsaw, Poland, 19-21 Oct 200

ON SUM AND PRODUCT THEOREMS FOR DIMENSION DIND

Abstract. For dimension Dind introduced by A. Arhangel’skij (cf. [2]) we prove that Dind is finite iff the large inductive dimension Ind is finite. We also establish various sum and product theorems for Dind more strong than ones for Ind in [10]. 1