We should look at that closely sometime Reimundo. I have very strong doubts
that it is the category formalism as that really should not be playing any
role in creating and manipulating elements. It only comes into play when
dealing with multiple (distinct) parents. It might also be that you need
Dear All,
Recently I had to do some calculations regarding the Killing vector fields.
When I used "show" command to display equations (which define the KV's)
involving derivatives I was not satisfied with what was displayed. Although
the differential equations were correct.
There are many conv
