文档介绍：W1VVI;PQVOIZM^I+IZTW[4QbÀZZIOI+MTIaI5IXTMIVL5I\PMUI\QKI)8ZWJTMU;WT^QVO)XXZWIKPNWZ5I\PMUI\QK[,UniversityofSonora,Sonora,árraga-CelayaDepartmentofPhysics,UniversityofSonora,Sonora,,whetherthewholeorpartofthematerialisconcerned,specificallythoseoftranslation,reprinting,re-useofillustrations,broadcasting,reproductionbyphotocopyingmachinesorsimilarmeans,:-,trademarks,,evenintheabsenceofaspecificstatement,eneraluse.©2007Springer-Verlag/WienPrintedinAustriaSpringerWienNewYorkispartofSpringerScience+:CamerareadybytheauthorsPrinting:HolzhausenDruckundMedienGmbH,1140Vienna,AustriaPrintedonacid-freeandchlorine-freebleachedpaperSPIN:12078479LibraryofCongressControlNumber:2007932621ISBN978-3-211-73264-9SpringerWienNewYorkToourparents,withinifiniteadmiration,love,,science,anden-gineering,plicatedproblemstofindexactorapproximateanalyticsolutions,numericsolu-tions,andillustrativetwo-andthree--cificanalytic,numerical,,puteralgebrasys-[7].Intheearly1970s,systemsofan-putations(SAC),puteralgebrasystems(CAS),putationalinteractiveprogramsthatfacilitatesymbolicmathematicsandcanhandleothertypeofprob-,Derive,andMacsyma,-stituteofTechnology(MI