EntityQ289610· pop 7· linked from 15 articlesoscillation theorySign in to saveConnectionsmathematicsEntityInternational Standard Book NumberEntitymathematical analysisEntityProvidenceEntitydigital object identifierEntitySchrödinger equationEntitybibcodeEntityQ118398Entityordinary differential equationEntityzero of a functionEntityCharles SturmEntityQ22908627EntityAmerican Mathematical SocietyEntityboundary value problemEntityWronskianEntityspectrumEntityBarry SimonEntitySturm–Liouville theoryEntityFrederick Valentine AtkinsonEntitySturm–Picone comparison theoremEntityCategoriesOrdinary differential equations