3 problems

Let $Y$ be a symplectic singularity, let $y\in Y$ be a closed point, and let $Y_{y,0}$ be the transversal symplectic slice in the formal product decomposition … A $\mathbb{G}_m$-ac…

Let $G$ be a countable discrete group with a left-invariant partial order $\preceq$. Let $f\in \mathbb{Z}(G)$ be semi-lopsided and satisfy … Set $m=\tau(f)$. Suppose either that…

Failure of additivity conjecture. There is such an exact sequence for which