X-robustness of interval circulant matrices in fuzzy algebra

Fuzzy algebra is an algebraic structure in which classical addition and multiplication are replaced by ⊕ and ⊗, where .A matrix is X-robust if its eigenspace is achieved starting at each vector from a given interval vector X.The possible and universal X-robustness of interval matrices over fuzzy algebra are defined. Polynomial algorithms for checking the possible and universal X-robustness of interval circulant matrices are described.