Examples of associative algebras for which the T-space of central polynomials is not finitely based

C. Bekh-Ochir, S. A. Rankin

In 1988, S. V. Okhitin proved that for any field k of characteristic zero, the T-space CP(M_2(k)) is finitely based, and he raised the question as to whether CP(A) is finitely base…