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selfAdjoint
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Looking at the astro-ph section of the preprint arxiv the last few days I was struck by two things: there ws a fresh flood of papers every day, and nearly every paper had multiple authors. Thinking about how long it takes to produce a paper, that's an awful lot of (presumably funded) work for a lot of people. Is astrophysics one of those niche fields where once you get in you're set for life (like actuarial science)?