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hep-th2026
An All-Loop Amplituhedron in Two Dimensions
Jonah Stalknecht
We define and study a positive geometry which serves as a natural generalization of loop amplituhedra to two-dimensional Minkowski space . The geometry…
hep-th2026
Which Functions Admit a Positive Geometry? From Branch Cuts to String Amplitudes
Hyungrok Kim, Jonah Stalknecht
Positive geometry provides a geometric framework where physical observables are encoded as canonical forms associated to regions of kinematic space. In this paper we consider a gen…