2 problems

Let $X=\operatorname{Tot}_{\mathbb P^1}(\mathcal O\oplus\mathcal O(-1)\oplus\mathcal O(-1))$ and let $P_{n,d}(X;T)$ be the equivariant stable-pair invariant, where $d$ is the degre…

Let $\lambda_1,\lambda_2,\lambda_3$ be the equivariant parameters for the torus action on $\mathbb C^4$, with the Calabi–Yau relation determining the fourth parameter, and let…