I recently discovered https://www.physicsoverflow.org. I read some posts here on meta but none of them answered my questions.
- I understand that it is not a SE site, but isn't it the same for MathOverflow? Why can I find MO on the list of sites of SE, but not PO?
- They do seem to have an "import from PSE" sections. Is it encouraged from (or at least ok for) the SE community to have some link between the two sites?