Recent observation of oscillating the two stream instability (TSI) in a solar type III radio bursts and spatial damping of Langmuir oscillations has made this i
To constrain the properties of dark matter, we study spiral galaxy rotation curves measured by the THINGS collaboration. A model that describes a mixture of two
It is generally accepted that the history of the expansion of the universe can be exactly described by the concordance model, which makes specific predictions a
The field of structures on set of secants is offered and methods of its construction for various classes of one-valued nonlinearities of static systems are cons
We investigate image formations in gravitational lensing systems using wave optics. Applying the Fresnel-Kirchhoff diffraction formula to waves scattered by a g