I currently have a postdoc position at University X. Now, I was wondering: if I apply to math postdocs advertised by the departments in the U.S. (sth. like Szego Assistant, Benjamin Peirce etc.), would I be able to accept such a postdoc position and defer it by one year to continue my postdoc at Uni X, or is this in general impossible?
I think I've seen people doing this where they would spend one year at let's say IAS or MSRI, but I am not entirely sure if such a procedure can be negotiated or whether it is rather unlikely.