List of Articles product space Open Access Article Abstract Page Full-Text 1 - An alternative proof for a characterization of inner product spaces Mahdi Dehghani 10.30495/jnrm.2022.52389.1885 Open Access Article Abstract Page Full-Text 2 - Development of Product Space Theory for Systemic Analysis of Industries in Kermanshah Province Shadi Ghiasi heirsh soltanpanah Adel Fatemi Abdolnaser Shojaei 10.30495/jsm.2022.1961993.1670 Open Access Article Abstract Page Full-Text 3 - Identification of industrial investment opportunities with economic complexity. A case study of selected provinces (West Adarbaijan, Ilam, Kurdistan and Kermanshah). Shadi Ghiasi Heirsh soltanpanah adel fatemi https://doi.org/10.71710/imj.2024-922724 Open Access Article Abstract Page Full-Text 4 - Novin Insurance Company's product diversification strategies using product space theory َAnvar khosravi 10.30495/imj.2023.1973174.1810 Open Access Article Abstract Page Full-Text 5 - Construction of frame relative to $n$-Hilbert space P. Ghosh T. K. Samanta