According to the general scheme [1], the definition of a codifferential calculus can be
obtained by systematical reversing of all arrows in the diagrams defining the first order
differential calculus on the algebra A. One has also to replace the words: algebra, bimodule
and multiplication by its dual counterparts: coalgebra, bicomodule and comultiplication,
etc. An interesting notion of braided Hopf algebra biderivation has been introduced in
[4].