págs. 473-477
The computable embedding problem
J. Carson, E. Fokina, V. S. Harizanov, J. F. Knight, S. Quinn
págs. 478-493
Computably enumerable sets and related issues
I. A. Lavrov
págs. 494-511
Positive undecidable numberings in the Ershov hierarchy
Mustafa Manat, Andrea Sorbi
págs. 512-525
Hereditarily pure associative algebras over a Dedekind ring whose maximal ideals have finite indices
L. M. Martynov
págs. 526-538
Universal theories for rigid soluble groups
A. G. Myasnikov, N. S. Romanovskii
págs. 539-552
Local and nonvanishing superatomic Boolean algebras with a distinguished dense subalgebra
D. E. Pal'chunov, A. V. Trofimov
págs. 553-569
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