[826] Hilbert algebras as topological algebras

[827] On non-linear differential equations of the second order: IV. The general equation $$\ddot y + kf\left( y \right)\dot y + g\left( y \right) = bkp\left( \varphi \right)$$ , φ=$t$+α, φ=$t$+α

[828] A class of special$L$_{α}spaces

[829] The homology groups of some ordered systems

[830] The blossoming of Schröder's fourth problem