EntityQ907306· pop 21· linked from 145 articlesWKB approximationSign in to savemethod for finding approximate solutions to linear differential equations with spatially varying coefficientsConnectionsquantum tunnelingEntityordinary differential equationEntityperturbation theoryEntityold quantum theoryEntityLyapunov stabilityEntityasymptotic expansionEntityAiry functionEntitybiologyEntityphysicsEntityastronomyEntitychemistryEntityIsaac NewtonPersoneconomicsEntitygeologyEntityGottfried Wilhelm LeibnizEntityLeonhard EulerEntityengineeringEntityquantum mechanicsEntityInternational Standard Book NumberEntitynatural scienceEntityCategoriesApproximationsAsymptotic analysisMathematical physics