$\beta$-almost solitons on almost co-k\"{a}hler manifolds
The object of the present paper is to study $\beta$-almost Yamabe solitons and $\beta$-almost Ricci solitons on almost co-K\"{a}hler manifolds. In this paper, we prove that if an almost co-K\"{a}hler manifold $M$ with the Reeb vector field $\xi$ admits a $\beta$-almost Yamabe solitons with the potential vector field $\xi$ or $b\xi$, where $b$ is a smooth function then manifold is $K$-almost co-K\"{a}hler manifold or the soliton is trivial, respectively. Also, we show if a closed $(\kappa,\mu)$-almost co-K\"{a}hler manifold with $n>1$ and $\kappa<0$ admits a $\beta$-almost Yamabe soliton then the soliton is trivial and expanding. Then we study an almost co-K\"{a}hler manifold admits a $\beta$-almost Yamabe soliton or $\beta$-almost Ricci soliton with $V$ as the potential vector field, $V$ is a special geometric vector field.