هومان مرادپور

The generalized and extended uncertainty principles affect the Newtonian gravity and also the geometry of the thermodynamic phase space. Under the influence of the latter, the energy– temperature relation of ideal gas may change. Moreover, it seems that the Newtonian gravity is modified in the framework of the R´enyi entropy formalism motivated by both the longrange nature of gravity and the extended uncertainty principle. Here, the consequences of employing the generalized and extended uncertainty principles, instead of the Heisenberg uncertainty principle, on the Jeans mass are studied. The results ofworking in theR´enyi entropy formalism are also addressed. It is shown that unlike the extended uncertainty principle and the R´enyi entropy formalism that lead to the same increase in the Jeans mass, the generalized uncertainty principle can decrease it. The latter means that a cloud with mass smaller than the standard Jeans mass, obtained in the framework of the Newtonian gravity, may also undergo the gravitational collapse process.