Hi, is there a way to make a mind map which would not be only a tree. I am mathematician and Sometimes I would like to indicate in the mind map that theorem C follows from two (or more) other results proposition A and B, something that I would draw like a graph :

A—-C

B—-/

I did not find how to do with marginnote 3. It seems that there is only the possibility to make trees.

Thank you in advance for your help.

Best regards

M. R.