In this paper, the iteration formula of the Maslov-type index theory for linear Hamiltonian systems with continuous, periodic, and symmetric coefficients is established. This formula yields a new ...

A Hirsch formula is proved for the singular chains of a second loop space and is applied to show that the symmetric Massey produce $\langle x \rangle^p$ is defined ...

PT-Symmetric quantum field theory represents a paradigm shift in the construction of quantum models by incorporating non‐Hermitian Hamiltonians that, owing to the combined action of parity (P) and ...