Topological spaces form the foundational framework for modern analysis and geometry, characterised by a set equipped with a collection of open subsets satisfying specific axioms. This flexible ...

The Menger property, a renowned covering property in topology, offers a generalisation of σ‑compactness by asserting that for any sequence of open covers, one can select finitely many elements from ...

This is a preview. Log in through your library . Abstract Most of the summability methods cannot be defined in an arbitrary Hausdorff topological space unless one introduces a linear or a group ...

The topological photonics plays an important role in the fields of fundamental physics and photonic devices. The Kagome model, the Su-Schrieffer-Heeger (SSH) model and the other topological models are ...