$σ$-Derivations in Banach Algebras

$σ$-homogeneity of Borel sets

$σ$-models on the quantum group manifolds $SL_{q}(2,R)$, $SL_{q}(2,R)/U_{h}(1)$, $C_{q}(2|0)$ and infinitesimal trasformations

$σ$-Relations, $σ$-functions and $σ$-antifunctions

$σ$-Set Theory: Introduction to the concepts of $σ$-antielement, $σ$-antiset and Integer Space

$φ$-prime submodules

$ψ$-Appell polynomials` solutions of an umbral difference nonhomogeneous equation

$ψ$-Poisson, $q$-Cigler, $ψ$-Dobinski, $ψ$-Rota and $ψ$-coherent states

$ω$-Lie algebras

$ω$-recurrence in cocycles

η-invariant and flat vector bundles II

'A planet of confusion and debate': children's and young people's response to the news coverage of Pluto's loss of planetary status

'Bottleneck' calculation of ion-electron recombination coefficients for lithium-like ions

'Congruent Partitions' of Polygons - a Short Introduction

'Dust' streaks on Mars

'Face and pyramids' in the Martian Cydonia Region. I - Speculations on an 'artificial' origin

'Fair' Partitions of Polygons - an Introduction

'Flux conservation' by a Schwarzschild gravitational lens

'Hausdorff distance' via conical cocompletion

'Holes' in the Zwicky catalogue