Title: K-theory of line bundles and smooth varieties,
Abstract: We give a $K$-theoretic criterion for a quasi-projective variety to be
smooth. If $\mathbb{L}$ is a line bundle corresponding to an ample invertible
sheaf on $X$, it suffices that $K_q(X) = K_q(\mathbb{L})$ for all
$q\le\dim(X)+1$.