SCIENTIFIC WORKS, VOL. 41, BOOK 3, 2026 – MATHEMATICS

Atanaska Georgieva, Yordanka Gudalova
Fuzzy natural transform to solve Volterra integro-differential equations, 1-17

Atanas Ilchev, Hristo Kiskinov, Hristina Kulina, Boyan Zlatanov
Reich and Bianchini contractivity forfinite-observation conditional guarded language operators, 18-33

Atanas Ilchev, Hristo Kiskinov, George Pashev, Boyan Zlatanov
Context-free fixed points and complete classification of orbits in Picard iteration for guarded power language operators, 34-56

Kristiana Temnilova, Iva Dokuzova
On the geomety of a three-dimensional Riemannian manifold with a skew-circulant structure and an associated metric, 57-79