I posted this question (previously called "Lagrangian of two pendulums tied together") five days ago, whereafter it was soon closed as off-topic. The reason for this was understandable: it looked as if I was asking for the solution of some exercise.
As I realized my mistake, I radically rewrote my question to embody the real, broader question I wanted to see answered and to be more relevant for others. My question became significantly different: I actually completely rewrote the title and body and changed some tags, so I thought it would be better to post it as a new question, as the comments and closure reason of the old post became completely irrelevant for the new question. However, one minute after my new post, it was marked as a duplicate of my old question and I was told to move it to my old post, so I did.
This brings me to my questions:
- Why is my question still not reopened? What can I do to improve the chances of it getting reopened?
- Why wasn't I allowed to post it as a new question, as my question essentially differs from the original one?
Thanks to Emilio Pisanty, I was able to describe the core of the problem, so I've rewritten the post for a second time. I kindly ask those who have the necessary privilege to give my question a second chance. In my eyes, the close reason has become completely obsolete.
Update: the post was reopened! Hooray!