- DiffAlgField -- the class of all vector fields

- diff(DiffAlgForm) -- exterior differential
- DiffAlgField _ DiffAlgForm -- contraction of a differential form with respect to a vector field
- DiffAlgForm _ DiffAlgField, see DiffAlgField _ DiffAlgForm -- contraction of a differential form with respect to a vector field
- DiffAlgForm * DiffAlgForm, see DiffAlgForm ^ DiffAlgForm -- exterior product
- DiffAlgForm ^ DiffAlgForm -- exterior product
- List * DiffAlgForm -- pull-back of a differential form by a rational map
- logarithmicForm(ZZ,List,String), see logarithmicForm -- creates a logarithmic form
- newForm(ZZ,ZZ,ZZ,String), see newForm -- constructor of a differential form
- newForm(String) -- constructor of a differential form

The object DiffAlgForm is a type, with ancestor classes DiffAlgElement < HashTable < Thing.