纽约大学数学建模笔记

IntroductiontoregularperturbationtheoryVeryoften,amathematicalproblemcannotbesolvedexactlyor,iftheexactsolutionisavailable,itexhibitssuchanintricatedependencyintheparametersthatitishardtouseassuch.Itmaybethecase,however,thataparametercanbeidentified,say",suchthatthesolution