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Handbook of Algebra, Volume 3 (Handbook of Algebra) PDF

1185 Pages·2003·5.37 MB·English
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HANDBOOKOFALGEBRA VOLUME3 ManagingEditor M.HAZEWINKEL,Amsterdam EditorialBoard M.ARTIN,Cambridge M.NAGATA,Okayama C.PROCESI,Rome R.G.SWAN,Chicago P.M.COHN,London A.DRESS,Bielefeld J.TITS,Paris N.J.A.SLOANE,MurrayHill C.FAITH,NewBrunswick S.I.AD’YAN,Moscow Y.IHARA,Tokyo L.SMALL,SanDiego E.MANES,Amherst I.G.MACDONALD,Oxford M.MARCUS,SantaBarbara L.A.BOKUT’,Novosibirsk ELSEVIER AMSTERDAM•BOSTON•HEIDELBERG•LONDON•NEWYORK• OXFORD•PARIS•SANDIEGO•SANFRANCISCO•SINGAPORE•SYDNEY•TOKYO HANDBOOK OF ALGEBRA Volume 3 edited by M. HAZEWINKEL CWI,Amsterdam 2003 ELSEVIER AMSTERDAM•BOSTON•HEIDELBERG•LONDON•NEWYORK• OXFORD•PARIS•SANDIEGO•SANFRANCISCO•SINGAPORE•SYDNEY•TOKYO ELSEVIERSCIENCEB.V. SaraBurgerhartstraat25 P.O.Box211,1000AEAmsterdam,TheNetherlands ©2003ElsevierScienceB.V.Allrightsreserved ThisworkisprotectedundercopyrightbyElsevierScience,andthefollowingtermsandconditionsapplytoitsuse: Photocopying Singlephotocopiesofsinglechaptersmaybemadeforpersonaluseasallowedbynationalcopyrightlaws.Permission ofthePublisherandpaymentofafeeisrequiredforallotherphotocopying,includingmultipleorsystematiccopying, copyingforadvertisingorpromotionalpurposes,resale,andallformsofdocumentdelivery.Specialratesareavailablefor educationalinstitutionsthatwishtomakephotocopiesfornon-profiteducationalclassroomuse. PermissionsmaybesoughtdirectlyfromElsevierScienceviatheirhomepage(http://www.elsevier.com) byselecting ‘Customersupport’andthen‘Permissions’.Alternativelyyoucansendane-mailto:[email protected],orfaxto: (+44)1865853333. IntheUSA,usersmayclearpermissionsandmakepaymentsthroughtheCopyrightClearanceCenter,Inc.,222Rosewood Drive,Danvers,MA01923,USA;phone:(+1)(978)7508400,fax:(+1)(978)7504744,andintheUKthroughtheCopy- rightLicensingAgencyRapidClearanceService(CLARCS),90TottenhamCourtRoad,LondonW1P0LP,UK;phone: (+44)2076315555;fax:(+44)2076315500.Othercountriesmayhavealocalreprographicrightsagencyforpayments. DerivativeWorks Tablesofcontentsmaybereproducedforinternalcirculation,butpermissionofElsevierScienceisrequiredforexternal resaleordistributionofsuchmaterial. PermissionofthePublisherisrequiredforallotherderivativeworks,includingcompilationsandtranslations. ElectronicStorageorUsage PermissionofthePublisherisrequiredtostoreoruseelectronicallyanymaterialcontainedinthiswork,includingany chapterorpartofachapter. Exceptasoutlinedabove,nopartofthisworkmaybereproduced,storedinaretrievalsystemortransmittedinanyform orbyanymeans,electronic,mechanical,photocopying,recordingorotherwise,withoutpriorwrittenpermissionofthe Publisher. Addresspermissionsrequeststo:ElsevierScienceGlobalRightsDepartment,atthefaxande-mailaddressesnotedabove. Notice NoresponsibilityisassumedbythePublisherforanyinjuryand/ordamagetopersonsorpropertyasamatterofproducts liability,negligenceorotherwise,orfromanyuseoroperationofanymethods,products,instructionsorideascontainedin thematerialherein.Becauseofrapidadvancesinthemedicalsciences,inparticular,independentverificationofdiagnoses anddrugdosagesshouldbemade. Firstedition2003 LibraryofCongressCataloging-in-PublicationData AcatalogrecordfromtheLibraryofCongresshasbeenappliedfor. BitishLibraryCataloguing-in-PublicationData AcatalogrecordfromtheBritishLibraryhasbeenappliedfor. ISBN:0444512640 ISSN:15707954 (cid:2)∞ThepaperusedinthispublicationmeetstherequirementsofANSI/NISOZ39.48-1992(PermanenceofPaper). PrintedinTheNetherlands. Preface Basicphilosophy Algebra,asweknowittoday,consistsofagreatmanyideas,conceptsandresults.Area- sonable estimate of the numberof these different“items” would be somewherebetween 50000and200000.Manyofthesehavebeennamedandmanymorecould(andperhaps should) have a “name”, or other convenient designation. Even the nonspecialist is quite likelytoencountermostofthese,eithersomewhereintheliteraturedistinguisedasadef- initionoratheoremortohearaboutthemandfeeltheneedformoreinformation.Ifthis happens, one should be able to find at least something in this Handbook;and hopefully enough to judge whether it is worthwhile to pursue the quest at least. In addition to the primaryinformationreferencestorelevantarticles,booksorlecturenotesshouldhelpthe readertocompletehisunderstanding. To make this possible we have providedan indexwhich is more extensivethan usual, andnotlimitedtodefinitions,theoremsandthelike. ForthepurposesofthisHandbook,algebrahasbeendefinedmoreorlessarbitrarilyas theunionofthefollowingareasoftheMathematicsSubjectClassificationScheme: –20 (Grouptheory) –19 (K-theory;thiswillbetreatedatanintermediatelevel) –18 (Categorytheoryandhomologicalalgebra;includingsomeoftheusesofcategoryin computerscience,oftenclassifiedsomewhereinsection68) –17 (Nonassociativeringsandalgebras;especiallyLiealgebras) –16 (Associativeringsandalgebras) –15 (Linearandmultilinearalgebra,Matrixtheory) –13 (Commutativeringsandalgebras;herethereisafinelinetotreadbetweencommu- tative algebrasand algebraicgeometry;algebraic geometryis definitely nota topic thatwillbedealtwithinthisHandbook;therewill,hopefully,onedaybeaseparate Handbookonthattopic) –12 (Fieldtheoryandpolynomials) –11 Thepartofthatalsousedtobeclassifiedunder12(Algebraicnumbertheory) –08 (Generalalgebraicsystems) –06 (Certainparts;butnottopicsspecifictoBooleanalgebrasasthereisaseparatethree- volumeHandbookofBooleanAlgebras) v vi Preface Planning Originally (1992), we expected to cover the whole field in a systematic way. Volume 1 wouldbedevotedtowhatisnowcalledSection1(seebelow),Volume2toSection2,and soon.Adetailedandcomprehensiveplanwasmadeintermsoftopicswhichneededtobe coveredandauthorstobeinvited.Thatturnedouttobeaninefficientapproach.Different authorshavedifferentprioritiesandtowaitforthelastcontributiontoavolume,asplanned originally,wouldhaveresultedinlongdelays.Therefore,wehaveoptedforadynamically evolvingplan.Thisalsopermitstotakenewdevelopmentsintoaccount. This means that articles are published as they arrive and that the reader will find in thisthird volumearticles fromfive differentsections. The advantagesof thisscheme are two-fold:acceptedarticles will be publishedquicklyand the outline of the series can be allowedtoevolveasthevariousvolumesarepublished.Suggestionsfromreadersbothas to topics to be covered and authors to be invited are most welcome and will taken into seriousconsideration. Thelistofthesectionsnowlooksasfollows: Section1: Linearalgebra.Fields.Algebraicnumbertheory Section2: Categorytheory.Homologicalandhomotopicalalgebra.Methodsfromlogic (algebraicmodeltheory) Section3: Commutativeandassociativeringsandalgebras Section4: Otheralgebraicstructures.Nonassociativeringsandalgebras.Commutative andassociativeringsandalgebraswithextrastructure Section5: Groupsandsemigroups Section6: Representationsandinvarianttheory Section7: Machinecomputation.Algorithms.Tables Section8: Appliedalgebra Section9: Historyofalgebra Foramoredetailedplan(2002version),thereaderisreferredtotheOutlineoftheSeries followingthispreface. Theindividualchapters Itisnottheintentionthatthehandbookasawholecanalsobeasubstituteundergraduate orevengraduate,textbook.Thetreatmentofthevarioustopicswillbemuchtoodenseand professionalfor that. Basically, the levelis graduateand up,and such materialas can be foundinP.M.Cohn’sthreevolumetextbook“Algebra”(Wiley)will,asarule,beassumed. An importantfunctionof the articles in this Handbookis to provideprofessionalmathe- maticiansworkinginadifferentareawithsufficientinformationonthetopicinquestionif andwhenitisneeded. Each chapter combines some of the features of both a graduate-level textbook and a research-level survey. Not all of the ingredients mentioned below will be appropriate in eachcase,butauthorshavebeenaskedtoincludethefollowing: Preface vii – Introduction(includingmotivationandhistoricalremarks) – Outlineofthechapter – Basicconcepts,definitions,andresults(proofsorideas/sketchesoftheproofsaregiven whenspacepermits) – Commentsontherelevanceoftheresults,relationstootherresults,andapplications – Reviewoftherelevantliterature;possiblysupplementedwiththeopinionoftheauthor onrecentdevelopmentsandfuturedirections – Extensivebibliography(severalhundreditemswillnotbeexceptional) Thefuture Of course, ideally, a comprehensive series of books like this should be interactive and have a hypertextstructure to make finding material and navigationthrough it immediate and intuitive. It should also incorporate the various algorithms in implemented form as wellaspermitacertainamountofdialoguewiththereader.Plansforsuchaninteractive, hypertext, CD-Rom-based version certainly exist but the realization is still a nontrivial numberofyearsinthefuture. Kvoseliai,July2003 MichielHazewinkel KaumnenntmandieDingebeimrichtigenNamen, soverlierensieihrengefährlichenZauber (Youhavebuttoknowanobjectbyitspropername forittoloseitsdangerousmagic) E.Canetti This Page Intentionally Left Blank Outline of the Series (asofJune2002) PhilosophyandprinciplesoftheHandbookofAlgebra ComparedtotheoutlineinVolume1thisversiondiffersinseveralaspects. First,thereisamajorshiftinemphasisawayfromcompletenessasfarasmoreelemen- tarymaterialisconcernedandtowardsmoreemphasisonrecentdevelopmentsandactive areas. Second,theplanisnowmoredynamicinthatthereisnolongerafixedlistoftopicsto becovered,determinedlonginadvance.Insteadthereisamoreflexiblenonrigidlistthat cananddoeschangeinresponsetonewdevelopmentsandavailabilityofauthors. Thenewpolicyistoworkwithadynamiclistoftopicsthatshouldbecovered,toarrange these in sections and larger groups according to the major divisions into which algebra falls,andtopublishcollectionsofcontributionsastheybecomeavailablefromtheinvited authors. Thecodingbystylebelowisasfollows. – Author(s)inbold,followedbychaptertitle:articles(chapters)thathavebeenreceived andarepublishedorreadyforpublication. – Chaptertitleinitalic:chaptersthatarebeingwritten. – Chaptertitleinplaintext:topicsthatshouldbecoveredbutforwhichnoauthorhasyet beendefinitelycontracted. – ChaptersthatareincludedinVolumes1–3havea(x;yypp.)afterthem,where‘x’isthe volumenumberand‘yy’isthenumberofpages. ComparedtotheplanthatappearedinVolume1thesectionon“Representationandin- varianttheory”hasbeenthoroughlyrevised.Thechangesofthiscurrentversioncompared totheoneinVolume2(2000)arerelativelyminor:mostlytheadditionofsome5topics. Section1.Linearalgebra.Fields.Algebraicnumbertheory A. LinearAlgebra G.P.Egorychev,VanderWaerdenconjectureandapplications(1;22pp.) V.L.Girko,Randommatrices(1;52pp.) A.N.Malyshev,Matrixequations.Factorizationofmatrices(1;38pp.) L.Rodman,Matrixfunctions(1;38pp.) CorrectiontothechapterbyL.Rodman,Matrixfunctions(3;1p.) ix

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Algebra, as we know it today, consists of many different ideas, concepts and results. An estimate of the number of these different "items" would be between 50,000 and 200,000. Many of these have been named and many more could have a "name" or a convenient designation. Even the non-specialist is like
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