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The aim of this paper is to give a set of central elements of the algebras$U'_q({\rm so}_m)$ and $U_q({\rm iso}_m)$ when q is a root of unity. They aresurprisingly arise from a single polynomial Casimir element of the algebra$U'_q({\rm so}_3)$. It is conjectured that the Casimir elements of thesealgebras under any values of q (not only for q a root of unity) and the centralelements for q a root of unity derived in this paper generate the centers of$U'_q({\rm so}_m)$ and $U_q({\rm iso}_m)$ when q is a root of unity.Comment: 6 pages, LaTa

Central elements of the algebras $U'_q({\rm so}_m)$ and $U_q({\rm iso}_m)$