For anyone pursuing and/or successfully doing hep-th research in grad school and beyond, it is necessarily a collaborative process? What is the extent of the collaboration required? I've noticed that a lot of the research being done seems to either happen as part of large groups or at the very least, as part of a collaboration between multiple faculty members within a particular institution. This seems to be in contrast to certain other theoretical subfields in physics such as AMO or condensed matter as well as mathematics research, where substantial research is undertaken by individuals. But is this universal or are there still problems being tackled that don't rely so heavily on collaboration? If the latter, what sort of problems? If the former, what are some theory subfields where research can be more easily undertaken without relying on collaboration? Also, how heavily does hep-th research rely on computational/numerical methods, and are there certain topics that can be approached in a more old-fashioned, pen and paper (or latex) way, like in math? Thanks!!