Abstract. Let R be a finitely generated commutative ring with 1, let A be an indecomposable 2-spherical generalized Cartan matrix of size at least 2 and M = M (A) the largest absolute value of a non-diagonal entry of A. We prove that there exists an integer n = n(A) such that the Kac-Moody group GA(R) has property (T ) whenever R has no proper ideals of index less than n and all positive integers less than or equal to M are invertible in R.
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