rcasjimenez

Thanks @jvdwetering!, you're right, that was the issue. I didn't know about the relabeling feature in the copy function. I have continued testing by applying transformations individually, not making previous...

Thanks for replying @jvdwetering. * I saw in the code (v0.8) what you are saying regarding some matchers. As far as I know, if I'm not mistaken, the matchers that...

Yes, now I see. The graph is not graph-like and I cannot apply the 'pivot' operation. @jvdwetering , so considering this, in order to apply the 'pivot' operation, I´d like...

I understand, thank you @jvdwetering. A naive question: How can I know if a transformation (any other transformation other than 'pivot', 'lcomp' and 'bialgebra' already mentioned) requires that the graph...

I am afraid that there are no references to the need to comply with that condition. If I take a look at the files: [rules.py](https://github.com/Quantomatic/pyzx/blob/master/pyzx/rules.py), [simplify.py](https://github.com/Quantomatic/pyzx/blob/master/pyzx/simplify.py), [hrules](https://github.com/Quantomatic/pyzx/blob/master/pyzx/hrules.py) and [hsimplify](https://github.com/Quantomatic/pyzx/blob/master/pyzx/hsimplify.py) no...