2 problems

Let $X$ be the regular arithmetic scheme considered above, of relative dimension $d$, and let $\Omega\in\widehat {\rm K}_0(X)$ be the arithmetic $K$-theory class represented by the…

Beilinson's regular-model conjecture. Every smooth projective variety $X$ over $\mathbb{Q}$ has a regular model $X_{\mathbb{Z}}$ that is projective and flat over $\mathbb{Z}$.