Publications by authors named "V D Ivashchuk"
On stable exponential cosmological solutions with two factor spaces in (1+ m + 2)-dimensional Einstein-Gauss-Bonnet model with -term.
Philos Trans A Math Phys Eng Sci
May 2022
Article Synopsis
- The study explores a multidimensional Einstein-Gauss-Bonnet gravitational model, focusing on the interplay between its Gauss-Bonnet and cosmological terms.
- It presents exact solutions characterized by exponential time dependence in two scale factors, linked to distinct Hubble-like parameters based on different dimensions.
- Stability analysis indicates that under specific conditions, these solutions maintain stability, especially within a subset with minor variations in the effective gravitational constant.
The paper is concerned with certain potentialities of enhancing the intensity of illumination of luminous devices fitted out with light guides used for shadowless illumination, diagnosis and thermal polymerization of filling photocompositions. Optimization of the geometry of the light concentrator is regarded as the main factor of enhancing the intensity of illuminations. Recommendations are given for the use of metallo-halogenic lamps for the same purposes.
View Article and Find Full Text PDF