Osama Abd El-hamed El-Tantawy, Sobhy Ahmed Ali El-sheikh, Salama Hussien Ali Shaliel
27-48
Soft double T ∗ i −spaces (T ∗∗ i −spaces), (i = 0, 1, 2, 3), SDT0−spaces, SDT 1 2 −spaces, SDT1−spaces, soft double Hausdorff spaces, soft double regular spaces, soft double R2−spaces (SDR2−spaces, for short), soft double subspaces, soft double open mappings, soft double closed mappings, soft double homeomorphism mappings, soft double continuous functions and separation axioms.