3 problems

Let $p$ be a momentum, let $H$ be its stabiliser, and let $\mathsf{H}^n(p)$ denote the absolute BRST cohomology at ghost number $n$, regarded as an $H$-module. Write…

Let $p$ be a momentum, let $H$ be its stabiliser, and let $\mathsf{H}^n(p)$ and $\mathsf{H}_{\mathrm{rel}}^n(p)$ denote the absolute and relative BRST cohomology groups at ghost nu…

Let $\mathsf{H}^n(0)$ denote the absolute BRST cohomology at ghost number $n$ and zero momentum, regarded as a representation of $\operatorname{SO}(25,1)$, and let $\mathbb{V}$ be…