Hc. Chang et Lc. Wang, ON GROUP-STRUCTURE ASSOCIATED TO JACOBIAN PAIRS WITH MIXED LEADING FORMS, Journal of pure and applied algebra, 119(1), 1997, pp. 1-11
Abhyankar had shown that in order to solve the Jacobian Conjecture, it
suffices to rule out the existence of Jacobian pairs with mixed leadi
ng form. Assume that such a pair {f, g} exists. Following Abhyankar, c
onsider the Laurent series expansion of {f, g} at infinity. Part of th
e coefficients of the series becomes invariants of certain group actio
n. We also obtain several old results proved by Moh by investigating t
he associated group action. (C) 1997 Elsevier Science B.V.