The Lattice of Quasivarieties of Torsion-Free Metabelian Groups A. I. Budkin OriginalPaper Pages: 92 - 104
Degree Spectra of Relations on Boolean Algebras S. S. GoncharovR. G. DowneyD. R. Hirschfeldt OriginalPaper Pages: 105 - 111
Initial Segments in Rogers Semilattices of \(\Sigma _n^0 \)-Computable Numberings S. Yu. Podzorov OriginalPaper Pages: 121 - 129