2 problems

Let $M$ be an $n$-dimensional differentiable manifold, and let $\boldsymbol{A},\boldsymbol{B}:TM\to TM$ be two nilpotent commuting $(1,1)$ tensor fields on $M$. Their generalized H…

Let $M$ be a differentiable manifold and let $\boldsymbol{A},\boldsymbol{B}:TM\rightarrow TM$ be two $(1,1)$ tensor fields. Assume that…