In this work we study Randers spacetimes of Berwald type and analyze Pfeifer Wohlfarth's vacuum field equation Finsler gravity for class. We show that in case the is equivalent to vanishing Ricci tensor, analogously Einstein gravity. This implies considered Rutz's coincide scenario. also construct all exact solutions Berwald-Randers gravity, which turn out be composed a CCNV (covariantly consta...

In the present work, two SIR patterns with demography will be considered: classical pattern and a modified linear coefficient of infection transmission. By reformulating each first-order differential systems as system second-order equations, we examine nonlinear dynamics from Jacobi stability perspective through Kosambi–Cartan–Chern (KCC) geometric theory. The intrinsic properties studied by de...

We show that every n-dimensional, $$\kappa $$ -noncollapsed, noncompact, complete ancient solution to the Ricci flow with uniformly PIC for $$n=4$$ or $$n\ge 12$$ has weakly $$_2$$ and bounded curvature. Combining this results in Brendle Naff (Rotational symmetry of solutions higher dimensions, arXiv:2005.05830 ), we prove any such is isometric either a family shrinking cylinders (or quotient t...