A negative answer to a question of Bass

G. Cortiñas, C. Haesemeyer, Mark E. Walker +1

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_…