10 citations · 16 across the 6 of their papers we have counts for
5 papers · 1 filter
Reconstruction through a coisotropic reduction: the missing momentum on a Poincaré section as a branched covering
E. Chan-López
Determining the momentum missing on a Poincaré section of a two-degree-of-freedom Hamiltonian is usually posed as the root-finding problem , which degenerates a…
Newton geometry of Bogdanov-Takens degeneracies in integrable dilatonic models: invariant divisors and boundary multiplicity
E. Chan-López, A. Martín-Ruiz, J. M. Paulin Fuentes
The Kantowski--Sachs interior of Grumiller's two-dimensional dilaton gravity model reduces to , , where is the expansion rate of the…
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…
The Bogdanov--Takens normal-form coefficients in as directional derivatives of the characteristic invariants
E. Chan-López
Let be a vector field on an open set of with and Jacobian of rank having as an eigenvalue of algebraic multiplicity two. Let s…
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…