Higher Integrability, Generalized Symmetries, and Partially Topological Field Theories

Abstract

We exhibit a classical link between higher Lax integrability and generalized symmetries in a non-Lorentzian higher semi-holomorphic Chern--Simons theory on $M\times\mathbb CP^1$. The equations of motion determine a spectrally dependent flat higher connection on $M$ whose Laurent coefficients organise an infinite hierarchy of conserved quantities. We construct a spectral family of classical $(d_M-2)$-form symmetry line defects associated with the Lax connection, establish an action-preserving deformation law, and exhibit suitable gauge-invariant probes on which the induced transformations act nontrivially.