2 papers
math.PR2026
Global universality via discrete-time signatures
Mihriban Ceylan, David J. Prömel
We establish global universal approximation theorems on spaces of piecewise linear paths, stating that linear functionals of the corresponding signatures are dense with respect to…
math.PR2026
Universal approximation with signatures of non-geometric rough paths
Mihriban Ceylan, Anna P. Kwossek, David J. Prömel
We establish a universal approximation theorem for signatures of rough paths that are not necessarily weakly geometric. By extending the path with time and its rough path bracket t…