Maintenance optimization of a two-component system with mixed observability

This paper proposes a POMDP-based framework for optimizing maintenance in a two-component system with mixed observability and unidirectional degradation dependence, establishing structural policy properties, developing a Baum-Welch parameter estimation method, and demonstrating through numerical experiments that the approach outperforms classical threshold policies with cost reductions of up to 6%.

Nan Zhang, Inmaculada T. Castro, M. L. Gamiz2026-03-05🔢 math

Index and Robustness of Mixed Equilibria: An Algebraic Approach

This paper introduces an algebraic method, based on Eisenbud et al. (1977), for computing the index of completely mixed equilibria in finite games to demonstrate that any integer can be such an index, while showing that for monogenic equilibria the index is restricted to {1,0,1}\{-1, 0, 1\} with non-zero values equivalent to payoff-robustness, and further extends these findings to extensive-form and boundary equilibria.

Lucas Pahl2026-03-05🔢 math

Super-decomposable pure-injective modules over some Jacobian algebras

This paper establishes the existence of superdecomposable pure-injective modules over Jacobian algebras associated with triangulations of closed surfaces (excluding spheres with four or fewer punctures) by demonstrating the presence of independent pairs of dense chains of pointed modules in non-domestic skew-gentle and (skew) Brauer graph algebras, thereby confirming M. Prest's conjecture for these specific cases.

Shantanu Sardar2026-03-05🔢 math

Unital $3dimensionalstructurablealgebras:classification,propertiesand-dimensional structurable algebras: classification, properties and \rm{AK}$-construction

This paper presents a complete classification of complex unital 3-dimensional structurable algebras into seven non-isomorphic classes, detailing their structural properties such as derivation algebras and automorphism groups, and investigates the resulting Z\mathbb{Z}-graded Lie algebras via the Allison-Kantor construction.

Kobiljon Abdurasulov, Maqpal Eraliyeva, Ivan Kaygorodov2026-03-05🔢 math