In this paper, we introduce right-invariant (similarly, left-invariant) Poisson-Nijenhuis Structures on Lie groupoids and their infinitesimal counterparts as called $(\Lambda , \mathbf{ n})-$structures. We present a mutual correspondence between $(\Lambda ,\mathbf{ n})-$structures on Lie algebroids with Poisson-Nijenhuis structures $(\Pi , \mathbf{ N})$ on their Lie groupoids under some conditions. Also, we will construct Poisson-Nijenhuis pair groupoids as an example from the invariance's point of view.
Categories: math.DG math-ph math.MP