Preface. Special issue devoted to the 4th Baltic–Nordic Workshop “Algebra, Geometry and Mathematical Physics”, Tartu 2008; p. 255

Generalization of connection based on the concept of graded q-differential algebra; pp. 256–264

Computing the index of Lie algebras; pp. 265–271

On the K-theory of the C*-algebra associated with a one-sided shift space; pp. 272–279

Pure spinor superfields, with application to D = 3 conformal models; pp. 280–289

A global, dynamical formulation of quantum confined systems; pp. 290–293

Equivariant Lie–Rinehart cohomology; pp. 294–300

Minimal Hilbert series for quadratic algebras and the Anick conjecture; pp. 301–305

Remarks on (super-)accelerating cosmological models in general scalar–tensor gravity; pp. 306–312

Deformations of embedded Einstein spaces; pp. 313–325

Bethe ansatz for the deformed Gaudin model; pp. 326–331

A note on Lie superalgebras; pp. 332–337

Commutativity and ideals in category crossed products; pp. 338–346

Quantum counterparts of VII_α, III_α=1, VI_α≠1 over the harmonic oscillator in semiclassical approximation; pp. 347–354

On the non-Koszulity of ternary partially associative operad; pp. 355–363

Group actions, orbit spaces, and noncommutative deformation theory; pp. 364–369

Finding a class of 2-groups; pp. 370–374

Transformations of semiholonomic 2- and 3-jets and semiholonomic prolongation of connections; pp. 375–380