(S. A. Badaev, B. S. Kalmurzaev, N. Mukash and M. Mustafa) Supported by KN MON RK, grant No. AP08856834.
(M. Mustafa) Supported by Nazarbayev University, grant FDCRG021220FD3851.
Citation:
S. A. Badaev, B. S. Kalmurzaev, N. K. Mukash, M. Mustafa, “One-element rogers semilattices in the Ershov hierarchy”, Algebra Logika, 60:4 (2021), 433–437; Algebra and Logic, 60:4 (2021), 284–287