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math-ph2026
From Null Modes to Gauge Generators: A Bordered Faddeev--Jackiw Theory of Constraint Chains
E. Chan-López
A null mode of the bordered Faddeev--Jackiw matrix is not, in general, a gauge generator. We determine exactly what the residual kernel encodes and identify the additional conditio…
math-ph2026
Matrix bordering structure of the Faddeev-Jackiw algorithm: kernel reduction and symbolic automation
E. Chan-López, A. Martín-Ruiz, Jaime Manuel Cabrera +1
We show that the iterative Faddeev-Jackiw (FJ) reduction for singular Lagrangian systems constitutes a geometrically constrained instance of the Matrix Bordering Technique (MBT). S…