Let us fix some FOCC δ : U → C. In analogy with the algebra case, the elements of
U can be called 1-form cofields. Let us take the left codual †U of U: its elements can
be called (left) vector cofields. Now, with any vector cofield X
.= Xi ⊗ ei ∈
†U one can
associate an endomorphism Xδ ∈ End C