Hello, everyone. Excuse me but I think I should post this question in sub-forum Calculus & Beyond Learning Materials but I can't access to that sub-forum and so... The question is: I began to learn to work with Maxima and I have several doubts. The help of the program is a little difficult for me. Is there another manual more explainable? For example 1) I can't display the components of Rieman Tensor. 2) In the stateman Rieman(dis) what are the "values" to dis? 3) christof (lcs) ou christof(mcs) sometimes displays those components sometimes nothing. Why? Thank you for your help. Good evening and till the next.