نتایج جستجو برای: exact solution
تعداد نتایج: 567534 فیلتر نتایج به سال:
Journal:
:Journal of Siberian Federal University. Mathematics & Physics
2020
Journal:
:Journal of Mathematical Physics
2005
Journal:
:Modern Physics Letters A
2022
For the inflaton field we determine a new exact solution by using Lie symmetry analysis. Specifically, construct second-order differential master equation for arbitrary scalar potential assuming that spectral index density perturbations $n_{s}$ and to tensor ratio $r$ are related as $n_{s}-1=h\left( r\right) $. Function $h\left( $ is classified according admitted symmetries equation. The possib...
Journal:
:Revista Mexicana de Astronomía y Astrofísica
2019
Journal:
:Proceedings of the Estonian Academy of Sciences
2019
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