The manual does not seem to have any functions for calculating matrix determinants and inverses:

http://zorro-project.com/manual/en/matrix.htm

Are there undocumented functions for that?
If no, how would you recommend to proceed?
Please advise.

PS:
Since machine learning routines often require these operations and machine learning is in fact implemented in Zorro, I suspect that these inverse and determinant undocumented functions do exist and I do hope for them to show up!