Published online by Cambridge University Press: 10 January 2020
We construct two infinite series of Moufang loops of exponent 3 whose commutative centre (i. e. the set of elements that commute with all elements of the loop) is not a normal subloop. In particular, we obtain examples of such loops of orders 38 and 311 one of which can be defined as the Moufang triplication of the free Burnside group B(3, 3).
Supported by the program of fundamental scientific research of SB RAS No. I.1.1., project No. 0314-2016-0001 and by FAPESP, process 2017/14489-2.