%0 Journal Article %T A negative answer to a question of Bass %A G. Corti£¿as %A C. Haesemeyer %A Mark E. Walker %A C. Weibel %J Mathematics %D 2010 %I arXiv %X In this companion paper to arXiv:0802.1928 we provide an example of an isolated surface singularity $R$ over a number field such that $K_0(R) = K_0(R[t])$ but $K_0(R) \neq K_0(R[t_1,t_2])$. This answers, negatively, a question of Bass. %U http://arxiv.org/abs/1004.3829v1