Sum, Subspace and Simple Extension of Invertible Neutrosophic Topological Spaces

In this paper, we investigate several fundamental constructions associated with Invertible Neutrosophic Topological Spaces (INTSs). In particular, we study the sum, subspace, and simple extension of INTSs and establish conditions under which these constructions preserve invertibility. The relationships between an invertible neutrosophic topology and the corresponding structures induced on its subspaces and extensions are examined. The results obtained provide further structural insights into INTSs and contribute to the development of their theory through fundamental topological constructions.