内容简介
ThisbookpresentsadefinitiveaccountoftheapplicationsofthealgebraicL-theorytothesurgeryclassificationoftopologicalmanifolds.ThecentralresultistheidentificationofamanifoldstructureinthehomotopytypeofaPoincarédualityspacewithalocalquadraticstructureinthechainhomotopytypeoftheuniversalcover.ThedifferencebetweenthehomotopytypesofmanifoldsandPoincarédualityspacesisidentifiedwiththefibreofthealgebraicL-theoryassemblymap,whichpassesfromlocaltoglobalquadraticdualitystructuresonchaincomplexes.ThealgebraicL-theoryassemblymapisusedtogiveapurelyalgebraicformulationoftheNovikovconjecturesonthehomotopyinvarianceofthehighersignatures;anyotherformulationnecessarilyfactorsthroughthisone.Thebookisdesignedasanintroductiontothesubject,accessibletograduatestudentsintopology;nopreviousacquaintancewithsurgerytheoryisassumed,andeveryalgebraicconceptisjustifiedbyitsoccurrenceintopology.