The distribution of descents and length in a Coxeter group.
We consider the existence or otherwise of canonical divisible normal subgroups of groups in general. We present more counterexamples than positive results. These counterexamples constitute the substantive part of this paper.
A construction is given, in a variety of groups, of a ``functorial center'' called the endocenter. The endocenter facilitates the identification of universal multiplication groups of groups in the variety, addressing the problem of determining when combinatorial multiplication groups are universal.
We prove that the Fibonacci morphism is an automorphism of infinite order of free Burnside groups for all odd and even .
We prove that the Fibonacci morphism is an automorphism of infinite order of free Burnside groups for all odd and even .