  We consider a nonlinear elliptic equation driven by the Robin $p$-Laplacian
plus an indefinite potential. In the reaction we have the competing effects of
a strictly $(p-1)$-sublinear parametric term and of a $(p-1)$-linear and
nonuniformly nonresonant term. We study the set of positive solutions as the
parameter $\lambda>0$ varies. We prove a bifurcation-type result for large
values of the positive parameter $\lambda$. Also, we show that for all
admissible $\lambda>0$, the problem has a smallest positive solution
$\overline{u}_\lambda$ and we study the monotonicity and continuity properties
of the map $\lambda\mapsto\overline{u}_\lambda$.
