A Class of Logistic Functions for Approximating State-Inclusive Koopman Operators. - Charles A. Johnson; Enoch Yeung (ACC, 2018)

Heterogeneous mixtures of dictionary functions to approximate subspace invariance in Koopman operators. - Charles A. Johnson; Shara Balakrishnan; Enoch Yeung (CoRR, 2022)

Learning Invariant Subspaces of Koopman Operators-Part 1: A Methodology for Demonstrating a Dictionary's Approximate Subspace Invariance. - Charles A. Johnson; Shara Balakrishnan; Enoch Yeung (CoRR, 2022)

Learning Invariant Subspaces of Koopman Operators-Part 2: Heterogeneous Dictionary Mixing to Approximate Subspace Invariance. - Charles A. Johnson; Shara Balakrishnan; Enoch Yeung (CoRR, 2022)

Heterogeneous Mixtures of Dictionary Functions to Approximate Subspace Invariance in Koopman Operators: Why Deep Koopman Operators Works. - Charles A. Johnson; Shara Balakrishnan; Enoch Yeung (J. Nonlinear Sci., 2025)