University of Sistan and Baluchestan Iranian Journal of Fuzzy Systems 1735-0654 23 5 2026 10 01 Colimits in the category of structural spaces and their realizations in fuzzy-type categories 129 145 10084 10.22111/ijfs.2026.53824.9550 EN Hadi Yavari Department of Pure Mathematics, Faculty of Mathematics and Computer, Shahid Bahonar University of Kerman, Kerman, Iran Seyed Naser Hosseini Department of Pure Mathematics, Faculty of Mathematics and Computer, Shahid Bahonar University of Kerman, Kerman, Iran Journal Article 2025 11 20 In this paper, we investigate the existence of colimits in the category of O-structural spaces, denoted by OSS. We show that OSS admits all small colimits. Special types of colimits, such as coproducts, coequalizers, and pushouts, are studied in detail. Based on these results, we explicitly describe the ‎O-structures of these colimits in several topological structures that are O‎-structural spaces, including the categories of fuzzy topological spaces in the sense of Chang, intuitionistic fuzzy topological spaces in the sense of Coker, fuzzy topological spaces in the sense of Chakraborty and Ahsanullah, soft and fuzzy soft topological spaces, neutrosophic topological spaces, hypersoft topological spaces and various types of topological molecular lattice structures. In particular, we show how these colimits can be recovered via the underlying O-structural framework. The results shed light on the internal structure of these categories and offer categorical tools for further analysis of generalized topological structures. https://ijfs.usb.ac.ir/article_10084_55834f216d1fb6ee4f7a367c0ae746eb.pdf