, Volume 30, Issue 1, pp 177-193

Free groups and semigroups in βN

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access
Communicated by Karl H. Hofmann
This author gratefully acknowledges support from the National Science Foundation via grant MCS 81-00733.
An original version of this paper by the first author was received on September 14, 1982.