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Abstract
We consider the possibility of the influences of additional dimensions on the dynamics of the expansion of our Universe. It is shown that this influence is expressed only through the anisotropy parameter of additional dimensions. In the isotropic (in relation to additional dimensions) case the dynamics of our world remains constant. All calculations were carried out for a single-component ideal fluid with power diagonal metrics. The dynamic characteristics of the scale factor have allowed us to draw a conclusion about the physical nature of the initial substance.