2 problems

Virtual splitting principle. There should exist a larger $bb$-ring $R'$ containing $R$ such that $x$ is finite-dimensional in $R'$: there are line elements $ell_i,ell'_j$ in $R'$ w…

Let $A$ be an object with endomorphisms $\pi_1$ and $\pi_2$. Set … and … Assume also that … for all $i$ and $j$. Let $\nu$ be the hook partition occurring in the definition of the…