4 problems

Consider the higher-derivative disformal transformation … where $C$, $D$, and $E$ are functions of the scalar field $\chi$ and $X$, and the last term also depends on the metric thr…

Consider deformations of the Einstein graviton-graviton-graviton three-particle S-matrix, and let $R$ schematically denote the Riemann tensor and $g$ the metric. Einstein three-par…

Let $s$ and $t$ be Mandelstam variables for a four-particle scattering amplitude in a consistent classical theory. Consider the limit $s\to\infty$ with $t$ fixed. Bounded-growth co…

Let $Q$ be the phase-space-valued operator whose equations of motion are produced by Bars' Chern--Simons action, and let $S_{\rm BRST}$ be the BRST action. Consider the combined ac…