Dear colleagues,

We are pleased to invite you to submit a paper to the Special Session entitled *Rough Sets and Hybrid Theories: Models, Logic, and Applications*, to be held within the framework of the *International Joint Conference on Rough Sets (*IJCRS 2026 <https://ijcrs2026.uca.es/>).

The special session aims to bring together researchers working on hybrid approaches that integrate rough sets with fuzzy sets, evidence theories, generalized probabilistic models, mathematics, and allied areas. Topics of interest include, but are not limited to:

*- *rough fuzzy sets,

• fuzzy rough sets,
• L-fuzzy sets and general rough sets,
• mereological and logical aspects of hybrid L-fuzzy sets,
• evidential rough sets,
• fusion methods,
• rough-set–valued stochastic models, -comparative studies between evidence theories and probabilistic rough sets;
• rough mereology,
• generalized rough inclusion functions,
• uni-norm–based rough mathematics.

Both theoretical contributions and methodological advances are welcome, as well as applications demonstrating the added value of hybrid models. The session seeks to foster discussion on foundations, unifying frameworks, and emerging directions in hybrid rough set research*.*

Kind regards

Stefania Boffa A. Mani Balasubramaniam Jayaram

Special Session Organizers – IJCRS 2026

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*Stefania Boffa* <stefania.boffa@iulm.it>

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