I have a question about the numbering in the appendix.
I want to proof a Lemma in the appendix which I used in the normal sections of my thesis. Therefore, I want to state the Lemma again in the appendix, followed by the proof. But I would like to keep the numbering of the Lemma the same as where I first used it instead of having them numbered with (A.1) etc.
In the normal chapters:
statement and formular (3.21)
Then in the Appendix it should also stay like this:
In order to proof equation (3.21), we have to....
I hope it is clear, what I'm looking for.