Descriptive Set Theory and Forcing

How to prove theorems about Borel sets the hard way

Häftad, Engelska, 1995

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This text is an advanced graduate course with some knowledge of forcing is assumed along with some elementary mathematical logic and set theory. The first half of the text deals with the general area of Borel hierarchies. What are the possible lengths of a Borel hierarchy in a separable metric space? Lebesgue showed that in an uncountable complete separable metric space the Borel hierarchy has uncountably many distinct levels, but for incomplete spaces the answer is independent. The second half includes Harrington's Theorem - it is consistent to have sets on the second level of the projective hierarchy size less than on the continuum and a proof and applications of Louveau's Theorem on hyperprojective parameters.

Produktinformation

Utgivningsdatum1995-09-18
Mått155 x 235 x 8 mm
Vikt224 g
FormatHäftad
SpråkEngelska
SerieLecture Notes in Logic
Antal sidor133
Upplaga1995
FörlagSpringer-Verlag Berlin and Heidelberg GmbH & Co. KG
ISBN9783540600596

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1 What are the reals, anyway?.- I On the length of Borel hierarchies.- 2 Borel Hierarchy.- 3 Abstract Borel hierarchies.- 4 Characteristic function of a sequence.- 5 Martin’s Axiom.- 6 Generic G?.- 7 ?-forcing.- 8 Boolean algebras.- 9 Borel order of a field of sets.- 10 CH and orders of separable metric spaces.- 11 Martin-Solovay Theorem.- 12 Boolean algebra of order ?1.- 13 Luzin sets.- 14 Cohen real model.- 15 The random real model.- 16 Covering number of an ideal.- II Analytic sets.- 17 Analytic sets.- 18 Constructible well-orderings.- 19 Hereditarily countable sets.- 20 Shoenfield Absoluteness.- 21 Mansfield-Solovay Theorem.- 22 Uniformity and Scales.- 23 Martin’s axiom and Constructibility.- 24 % MathType!MTEF!2!1!+-% feaagCart1ev2aaatCvAUfKttLearuavP1wzZbItLDhis9wBH5garm% Wu51MyVXgaruWqVvNCPvMCaebbnrfifHhDYfgasaacH8srps0lbbf9% q8WrFfeuY-Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0-yr0RYxir% -Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciGacaGa% aeqabaWaaeaaeaaakeaacqGHris5daqhaaWcbaGaeGOmaidabaGaeG% ymaedaaaaa!3322!$$\sum _2^1$$ well-orderings.- 25 Large % MathType!MTEF!2!1!+-% feaagCart1ev2aaatCvAUfKttLearuavP1wzZbItLDhis9wBH5garm% Wu51MyVXgaruWqVvNCPvMCaebbnrfifHhDYfgasaacH8srps0lbbf9% q8WrFfeuY-Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0-yr0RYxir% -Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciGacaGa% aeqabaWaaeaaeaaakeaacqGHpis1daqhaaWcbaGaeGOmaidabaGaeG% ymaedaaaaa!3310!$$\prod _2^1$$ sets.- III Classical Separation Theorems.- 26 Souslin-Luzin Separation Theorem.- 27 Kleene Separation Theorem.- 28 % MathType!MTEF!2!1!+-% feaagCart1ev2aaatCvAUfKttLearuavP1wzZbItLDhis9wBH5garm% Wu51MyVXgaruWqVvNCPvMCaebbnrfifHhDYfgasaacH8srps0lbbf9% q8WrFfeuY-Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0-yr0RYxir% -Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciGacaGa%aeqabaWaaeaaeaaakeaacqGHpis1daqhaaWcbaGaeGymaedabaGaeG% ymaedaaaaa!330E!$$\prod _1^1$$-Reduction.- 29 % MathType!MTEF!2!1!+-% feaagCart1ev2aaatCvAUfKttLearuavP1wzZbItLDhis9wBH5garm% Wu51MyVXgaruWqVvNCPvMCaebbnrfifHhDYfgasaacH8srps0lbbf9% q8WrFfeuY-Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0-yr0RYxir% -Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciGacaGa% aeqabaWaaeaaeaaakeaacqGHuoardaqhaaWcbaGaeGymaedabaGaeG% ymaedaaaaa!32E3!$$\Delta _1^1$$-codes.- IV Gandy Forcing.- 30 % MathType!MTEF!2!1!+-% feaagCart1ev2aaatCvAUfKttLearuavP1wzZbItLDhis9wBH5garm% Wu51MyVXgaruWqVvNCPvMCaebbnrfifHhDYfgasaacH8srps0lbbf9% q8WrFfeuY-Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0-yr0RYxir% -Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciGacaGa% aeqabaWaaeaaeaaakeaacqGHpis1daqhaaWcbaGaeGymaedabaGaeG% ymaedaaaaa!330E!$$\prod _1^1$$ equivalence relations.- 31 Borel metric spaces and lines in the plane.- 32 % MathType!MTEF!2!1!+-% feaagCart1ev2aaatCvAUfKttLearuavP1wzZbItLDhis9wBH5garm% Wu51MyVXgaruWqVvNCPvMCaebbnrfifHhDYfgasaacH8srps0lbbf9% q8WrFfeuY-Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0-yr0RYxir% -Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciGacaGa% aeqabaWaaeaaeaaakeaacqGHris5daqhaaWcbaGaeGymaedabaGaeG% ymaedaaaaa!3320!$$\sum _1^1$$ equivalence relations.- 33 Louveau’s Theorem.- 34 Proof of Louveau’s Theorem.- References.- Elephant Sandwiches.