be smooth $(0,1)$-forms with values in the holomorphic tangent bundle. Use the contraction convention under which, for a $(0,q)$-form $\alpha$, a holomorphic vector field $V$, and a holomorphic form $\eta$, one has
For iterated contractions, extend this convention by requiring that, for $(0,q)$-forms $\alpha,\beta$, holomorphic vector fields $V,W$, and a holomorphic form $\eta$,