1. Complexity of Boolean algebras and their Scott rank

   • P. E. Alaev

   OriginalPaper Pages: 353 - 366

2. Δ-spaces

   • Yu. L. Ershov

   OriginalPaper Pages: 367 - 373

3. Superintuitionistic logics and the projective beth property

   • L. L. Maksimova

   OriginalPaper Pages: 374 - 382

4. Computable classes of constructivizations of 2-constructivizable models

   • S. Yu. Podzorov

   OriginalPaper Pages: 383 - 396

5. Strong Mal’tsev conditions in varieties of Abelian groups

   • D. M. Smirnov

   OriginalPaper Pages: 397 - 409

6. Constructivizability criterion for an Abelian group

   • N. G. Khisamiev

   OriginalPaper Pages: 410 - 419