I recently came across a problem statement question about a block matrix inverse. The original author did not include context, and the question got put on hold.
I personally know a lot of situations where matrix inverses like this occur, as I regularly encounter matrices of this form in my research. They are quite interesting (to me at least).
Is it appropriate or innapropriate for me to improve the question by adding my own version of context, considering that the author of the question has supplied none?