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EN
The archaeozoological sequence of terrestrial vertebrates from the multicomponent site Dudka, in the former Great Masurian Lake is confronted with other available bioarchaeological data and inferences. This evaluation supports the idea that Dudka island was occupied seasonally by Mesolithic, Zedmar and Late Neolithic people and hunting may have been an opportunistic activity on the island during the spring fishing and the fall gathering season there. The question is raised why people crossed from the mainland to Dudka island for fishing and gathering, fish and nuts being no doubt also accessible on the mainland in the appropriate seasons.
EN
This paper is devoted to ARMA models with timedependent coefficients, including well-known periodic ARMA models. We provide state-space representations and Kalman-type recursions to derive a Wold–Cramér decomposition for the least squares residuals. This decomposition turns out to be very convenient for further developments related to parameter least squares estimation. Some examples are proposed to illustrate the main purpose of these state-space forms.
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