LEADER 03941nam 22007935 450 001 9910146310903321 005 20250730104857.0 010 $a3-540-48284-9 024 7 $a10.1007/BFb0093968 035 $a(CKB)1000000000437300 035 $a(SSID)ssj0000326506 035 $a(PQKBManifestationID)12082549 035 $a(PQKBTitleCode)TC0000326506 035 $a(PQKBWorkID)10296764 035 $a(PQKB)11730812 035 $a(DE-He213)978-3-540-48284-0 035 $a(MiAaPQ)EBC5578287 035 $a(Au-PeEL)EBL5578287 035 $a(OCoLC)1066179036 035 $a(MiAaPQ)EBC6866760 035 $a(Au-PeEL)EBL6866760 035 $a(PPN)155175742 035 $a(EXLCZ)991000000000437300 100 $a20121227d1999 u| 0 101 0 $aeng 135 $aurnn|008mamaa 181 $ctxt 182 $cc 183 $acr 200 10$aSemi-algebraic Function Rings and Reflectors of Partially Ordered Rings /$fby Niels Schwartz, James J. Madden 205 $a1st ed. 1999. 210 1$aBerlin, Heidelberg :$cSpringer Berlin Heidelberg :$cImprint: Springer,$d1999. 215 $a1 online resource (XIII, 279 p.) 225 1 $aLecture Notes in Mathematics,$x1617-9692 ;$v1712 300 $aBibliographic Level Mode of Issuance: Monograph 311 08$a3-540-66460-2 327 $aPreordered and partially ordered rings -- Reflective subcategories -- Totally ordered and real closed fields -- Real spectra of preordered rings -- Epimorphisms of reduced porings -- Functions and representable porings -- Semi-algebraic functions -- Comparing reflectors -- Constructing reflectors -- H-closed epireflectors -- Quotient-closed reflectors -- The real closure reflector -- Arities of reflectors and approximations by H-closed reflectors -- Epimorphic extensions of reduced porings -- Essential monoreflectors -- Reflections of totally ordered fields -- von Neumann regular f-rings -- Totally ordered domains -- Reduced f-rings -- Rings of continuous piecewise polynomial functions -- Rings of continuous piecewise rational functions -- Discontinuous semi-algebraic functions -- The lattice of H-closed monoreflectors. 330 $aThe book lays algebraic foundations for real geometry through a systematic investigation of partially ordered rings of semi-algebraic functions. Real spectra serve as primary geometric objects, the maps between them are determined by rings of functions associated with the spectra. The many different possible choices for these rings of functions are studied via reflections of partially ordered rings. Readers should feel comfortable using basic algebraic and categorical concepts. As motivational background some familiarity with real geometry will be helpful. The book aims at researchers and graduate students with an interest in real algebra and geometry, ordered algebraic structures, topology and rings of continuous functions. 410 0$aLecture Notes in Mathematics,$x1617-9692 ;$v1712 606 $aAlgebra 606 $aNumber theory 606 $aGeometry 606 $aGeometry, Algebraic 606 $aNonassociative rings 606 $aAlgebra 606 $aNumber Theory 606 $aGeometry 606 $aAlgebraic Geometry 606 $aNon-associative Rings and Algebras 615 0$aAlgebra. 615 0$aNumber theory. 615 0$aGeometry. 615 0$aGeometry, Algebraic. 615 0$aNonassociative rings. 615 14$aAlgebra. 615 24$aNumber Theory. 615 24$aGeometry. 615 24$aAlgebraic Geometry. 615 24$aNon-associative Rings and Algebras. 676 $a516.3 700 $aSchwartz$b Niels$f1950-$062483 702 $aMadden$b James J. 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910146310903321 996 $aSemi-algebraic function rings and reflectors of partially ordered rings$9262403 997 $aUNINA