I often read papers and am stuck on important statements/equations that are not satisfactorily explained to my understanding. Sometimes references are provided, but even then it's cumbersome to recursively look up all the referenced material and many times the answer cannot be found in the provided reference. Sometimes equations/statements appear out of the blue with no chance for explanation. As I observed, most people just jump over them and proceed with the paper, but that bugs me.
What would be a good platform to ask questions related to papers? Is there any? If not, could we build one on stackexchange? It should be searchable by tags but also by the title, authors and doi of the papers.