... conjugacy classes in G and the (adelic) traceformula and its stabilization [Lan79]. For the case at hand when working over Z,there is the added issue associated with the lack of a local to global principle ... that everyreciprocal g is equivalent to an f = [a, b, c]witha = c. Moreover, since [a, b, a] isequivalent to [ a, −b, a] it follows that every reciprocal class has a representativeform f = [a, ... Springer-Verlag, Berlin, 1999, Fano varieties, A translation of Algebraicgeometry. 5 (Russian), Ross. Akad. Nauk, Vseross. Inst. Nauchn. i Tekhn. Inform.,Moscow, Translation edited by A. N. Parshin and...