Wallbaum John

Publications in Math-Net.Ru

1. Classifications of definable subsets
   
   Algebra Logika, 58:5 (2019),  574–608
2. A $\Delta^0_2$-poset with no positive presentation
   
   Algebra Logika, 51:4 (2012),  423–428
3. The computable embedding problem
   
   Algebra Logika, 50:6 (2011),  707–732