Conductors of international stature regularly flit from job to job, leaving little mark on any one city in which they might alight for a week or two. But for conductors of smaller ensembles who make their careers with a single ensemble in a single town, the roots put down can run deep. So what happens when one of those ensembles dies for lack of money? Enter Ruben Vartanyan, the 69-year-old music director of the newly bankrupt Arlington Symphony in suburban Washington, D.C. “There is a move afoot to resurrect the symphony in a more modest form… But the odds are long. Funding is scarce. And the work to rebuild could be enormous. The old conductor, though, is available.”