<prompt> Bheka isigaba esingezansi bese uphendula umbuzo emva kwalokho ngolimi olufanayo nesigaba: Isifinyezo: Ucwaningo lwamaqembu e-Abel akhiqizwa ngokucacile luvuthiwe, kufaka phakathi i-theorem eyisisekelo yamaqembu e-Abel akhiqizwa ngokucacile; futhi okubonisa lesi simo sezinto, imibono eminingi ehlobene neqembu, njenge-center kanye ne-commutator, ichaza ukuthi iqembu elinikeziwe alilona i-Abel. Umbuzo: Yiliphi igama elilodwa elichaza kangcono indlela la maqembu akhiwa ngayo?  <response>: ngokungenamkhawulo 