Chapter 1. Homological infinity of 4D universe for every 3-manifold -- Chapter 2. On the exponents of $[J(X), \Omega (Y)]$ -- Chapter 3. Nielsen theory on the nilmanifold $\Gamma_{m+1}\backslash\mathrm{Heis}^{m+1}$ of the generalized Heisenberg group $\mathrm{Heis}^{m+1}$ -- Chapter 4. Vector field problem for homogeneous spaces -- Chapter 5. Lickorish type classification of closed manifolds over simple polytopes -- Chapter 6. Stable and unstable stratifications on classifying spaces of acyclic categories -- Chapter 7. Equivariant cohomology of torus orbifolds with two vertices -- Chapter 8. Free torus actions on products of Milnor manifolds -- Chapter 9. The cohomology classes of a point and the diagonal in flag manifolds -- Chapter 10. On a construction for the generators of the polynomial algebra as a module over the Steenrod algebra -- Chapter 11. KO-groups of stunted complex and quaternionic projective spaces -- Chapter 12. Homotopy groups of (n-1)-connected (2n + 1)-manifolds -- Chapter 13. A note on the topology of polygonal spaces -- Chapter 14. Generalized unknotting number of virtual links.