Existence of non-equivariant stable-envelope integrals for type A quiver varieties

Let $X$ be a type A Nakajima quiver variety with its natural torus action, let $p$ be a $\mathsf{T}$-fixed point, and let $\boldsymbol{a}\to 0$ denote the non-equivariant limit. Quiver-variety limit conjecture. The scaled limit

$$\hbar^{\dim(X)/2}\lim_{\boldsymbol{a}\to 0}\int_X\operatorname{Stab}(p)$$

exists. This extends the existence phenomenon for $T^*Gr(k,n)$ to all type A Nakajima quiver varieties, while the paper gives bow-variety examples where the corresponding limit fails.