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Ω-sequential compactness and orbital connectedness in tri-topological spaces
AIMS Mathematics 2026, 11(7): 22401-22409
Published: 15 July 2026
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We introduce and study two novel topological invariants in the context of tri-topological spaces: Ω-sequential compactness and orbital connectedness. Unlike the classical approach to multi-topological spaces, we define tri-topological spaces through an interaction function ρ : τ 1 × τ 2 → P ( X ) that encodes sophisticated relationships among three topologies. These invariants extend classical notions of sequential compactness and path connectedness, providing powerful tools for distinguishing tri-topological spaces. We establish fundamental theorems regarding their preservation under tri-continuous mappings, behavior in tri-product spaces, and relationships with classical topological properties. Additionally, we develop new tri-separation axioms based on these invariants and provide illustrative examples demonstrating their independence from standard properties.

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