简介:ThispapersolvesanopenproblemofVaserstein.Themainresultis:theequationx^m+y^m=z^mhasasolutioninSL2zifandonlyifmisnotdivisibleby4or6andmisnotcongruentto3modulo6.
SOLUTIONS OF THE EQUATION X^m+y^m=z^m IN SL_2z