solved so called Burnside conjecture in t=e 80s. It is possible to write him and ask if there anything in this field= He knows for sure. Regards, Andrei Konayev 23.01.2018, 14:40, "SB (Serguei Beloussov)" EFTA_R1_01872365 EFTA02639794 regards sb@ Begin forwarded message: From: "Jeffrey E." <jeevacatio