Mindmap : other than tree?

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 :

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.

You can use the summary function. Tap the select button, then tap on A and B, then tap on Summary, and it will create a new node C that stems from A and B

Thank you very much for your answer but I would like C to be an excerpt and with summary it is not possible. Is it ?

1 Like

I am having the exact same problem! I would love to add an excerpt to a summary