LEADER 01432nam 2200373 a 450 001 9910695169503321 005 20060621143258.0 035 $a(CKB)5470000002367033 035 $a(OCoLC)70152355 035 $a(EXLCZ)995470000002367033 100 $a20060621d2006 ua 0 101 0 $aeng 135 $aurmn|---||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aPersonnel practices$b[electronic resource] $econversions of employees from noncareer to career positions May 2001 - April 2005 : report to congressional requesters 210 1$a[Washington, D.C.] :$cU.S. Government Accountability Office,$d[2006] 215 $ai, 77 pages $cdigital, PDF file 300 $aTitle from title screen (viewed on June 13, 2006). 300 $a"May 2006." 300 $aPaper version available from: U.S. Government Accountability Office, 441 G St., NW, Rm. LM, Washington, D.C. 20548. 300 $a"GAO-06-381." 320 $aIncludes bibliographical references. 517 $aPersonnel practices 606 $aAdministrative agencies$zUnited States$xPersonnel management 607 $aUnited States$xOfficials and employees$xSelection and appointment 615 0$aAdministrative agencies$xPersonnel management. 801 0$bGPO 801 1$bGPO 906 $aBOOK 912 $a9910695169503321 996 $aPersonnel practices$93426743 997 $aUNINA LEADER 06163nam 22006133 450 001 9910973246903321 005 20231110220645.0 010 $a9781470471712 010 $a147047171X 035 $a(MiAaPQ)EBC29378995 035 $a(Au-PeEL)EBL29378995 035 $a(CKB)24267882200041 035 $a(OCoLC)1336954489 035 $a(EXLCZ)9924267882200041 100 $a20220721d2022 uy 0 101 0 $aeng 135 $aurcnu|||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aCancellation for Surfaces Revisited 205 $a1st ed. 210 1$aProvidence :$cAmerican Mathematical Society,$d2022. 210 4$d©2022. 215 $a1 online resource (124 pages) 225 1 $aMemoirs of the American Mathematical Society ;$vv.278 311 08$aPrint version: Flenner, H. Cancellation for Surfaces Revisited Providence : American Mathematical Society,c2022 9781470453732 327 $aCover -- Title page -- Introduction -- Chapter 1. Generalities -- 1.1. Cancellation and the Makar-Limanov invariant -- 1.2. Non-cancellation and Gizatullin surfaces -- 1.3. The Danielewski-Fieseler construction -- 1.4. Affine modifications -- Chapter 2. ¹-fibered surfaces via affine modifications -- 2.1. Covering trick and GDF surfaces -- 2.2. Pseudominimal completion and extended divisor -- 2.3. Blowup construction -- 2.4. GDF surfaces via affine modifications -- Chapter 3. Vector fields and natural coordinates -- 3.1. Locally nilpotent vertical vector fields -- 3.2. Standard affine charts -- 3.3. Natural coordinates -- 3.4. Special _{ }-quasi-invariants -- 3.5. Examples of GDF surfaces of Danielewski type -- Chapter 4. Relative flexibility -- 4.1. Definitions and the main theorem -- 4.2. Transitive group actions on Veronese cones -- 4.3. Relatively transitive group actions on cylinders -- 4.4. A relative Abhyankar-Moh-Suzuki Theorem -- Chapter 5. Rigidity of cylinders upon deformation of surfaces -- 5.1. Equivariant Asanuma modification -- 5.2. Rigidity of cylinders under deformations of GDF surfaces -- 5.3. Rigidity of cylinders under deformations of ¹-fibered surfaces -- 5.4. Rigidity of line bundles over affine surfaces -- Chapter 6. Basic examples of Zariski factors -- 6.1. Line bundles over affine curves -- 6.2. Parabolic _{ }-surfaces: an overview -- 6.3. Parabolic _{ }-surfaces as Zariski factors -- Chapter 7. Zariski 1-factors -- 7.1. Stretching and rigidity of cylinders -- 7.2. Non-cancellation for GDF surfaces -- 7.3. Extended graphs of Gizatullin surfaces -- 7.4. Zariski 1-factors and affine ¹-fibered surfaces -- Chapter 8. Classical examples -- Chapter 9. GDF surfaces with isomorphic cylinders -- 9.1. Preliminaries -- 9.2. Classification of GDF cylinders up to -isomorphism -- 9.3. GDF surfaces whose fiber trees are bushes. 327 $a9.4. Spring bushes versus bushes -- 9.5. Cylinders over Danielewski-Fieseler surfaces -- 9.6. Proof of the main theorem -- Chapter 10. On moduli spaces of GDF surfaces -- 10.1. Coarse moduli spaces of GDF surfaces -- 10.2. The automorphism group of a GDF surface -- 10.3. Configuration spaces and configuration invariants -- 10.4. Versal deformation families of trivializing sequences -- 10.5. Proof of Theorem 10.1.3 -- Acknowledgments -- Bibliography -- Back Cover. 330 $a"The celebrated Zariski Cancellation Problem asks as to when the existence of an isomorphism X An X An for (affine) algebraic varieties X and X implies that X X. In this paper we provide a criterion for cancellation by the affine line (that is, n 1) in the case where X is a normal affine surface admitting an A1-fibration X B with no multiple fiber over a smooth affine curve B. For two such surfaces X B and X B we give a criterion as to when the cylinders X A1 and X A1 are isomorphic over B. The latter criterion is expressed in terms of linear equivalence of certain divisors on the Danielewski-Fieseler quotient of X over B. It occurs that for a smooth A1-fibered surface X B the cancellation by the affine line holds if and only if X B is a line bundle, and, for a normal such X, if and only if X B is a cyclic quotient of a line bundle (an orbifold line bundle). If X does not admit any A1-fibration over an affine base then the cancellation by the affine line is known to hold for X by a result of Bandman and Makar-Limanov. If the cancellation does not hold then X deforms in a non-isotrivial family of A1-fibered surfaces B with cylinders A1 isomorphic over B. We construct such versal deformation families and their coarse moduli spaces provided B does not admit nonconstant invertible functions. Each of these coarse moduli spaces has infinite number of irreducible components of growing dimensions; each component is an affine variety with quotient singularities. Finally, we analyze from our viewpoint the examples of non-cancellation constructed by Danielewski, tom Dieck, Wilkens, Masuda and Miyanishi, e.a"--$cProvided by publisher. 410 0$aMemoirs of the American Mathematical Society 606 $aSurfaces, Algebraic 606 $aCancellation theory (Group theory) 606 $aModuli theory 606 $aAlgebraic geometry -- Affine geometry -- Affine spaces (automorphisms, embeddings, exotic structures, cancellation problem)$2msc 606 $aAlgebraic geometry -- Families, fibrations -- Fine and coarse moduli spaces$2msc 615 0$aSurfaces, Algebraic. 615 0$aCancellation theory (Group theory) 615 0$aModuli theory. 615 7$aAlgebraic geometry -- Affine geometry -- Affine spaces (automorphisms, embeddings, exotic structures, cancellation problem). 615 7$aAlgebraic geometry -- Families, fibrations -- Fine and coarse moduli spaces. 676 $a516.3/52 676 $a516.352 686 $a14R10$a14D22$2msc 700 $aFlenner$b H$01800248 701 $aKaliman$b S$01800249 701 $aZaidenberg$b M$01800250 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910973246903321 996 $aCancellation for Surfaces Revisited$94344957 997 $aUNINA LEADER 04553nam 22008535 450 001 9910298559803321 005 20251117075012.0 010 $a3-319-06160-7 024 7 $a10.1007/978-3-319-06160-3 035 $a(CKB)3710000000143712 035 $a(EBL)1782903 035 $a(SSID)ssj0001268808 035 $a(PQKBManifestationID)11745532 035 $a(PQKBTitleCode)TC0001268808 035 $a(PQKBWorkID)11277979 035 $a(PQKB)10663936 035 $a(MiAaPQ)EBC1782903 035 $a(DE-He213)978-3-319-06160-3 035 $a(PPN)179765000 035 $a(EXLCZ)993710000000143712 100 $a20140626d2014 u| 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aSmart City $eHow to Create Public and Economic Value with High Technology in Urban Space /$fedited by Renata Paola Dameri, Camille Rosenthal-Sabroux 205 $a1st ed. 2014. 210 1$aCham :$cSpringer International Publishing :$cImprint: Springer,$d2014. 215 $a1 online resource (239 p.) 225 1 $aProgress in IS,$x2196-8705 300 $aDescription based upon print version of record. 311 08$a1-322-13507-X 311 08$a3-319-06159-3 320 $aIncludes bibliographical references at the end of each chapters and index. 327 $aIntroduction -- Smart and Digital City: A Systematic Literature Review -- Comparing Smart and Digital City: Project and Strategies in Amsterdam and Genova. Are they Digital and/or Smart? -- Smart, Smarter, Smartest: Redefining our Cities -- Recommendations to Improve the Smartness of a City -- Smart City and Creation of Public Value -- Performance Measurement in the Smart Cities -- Empowered Cities? A Framework for Analyzing the Structure and Generated Value of a Smart City. Case Study Gent -- A Fleet Routing Problem on Edge Labeled Urban Distribution Networks -- Smart Security: Integrated System for Safety Policies in Urban Environments. 330 $aThis book presents a comprehensive overview of the various aspects for the development of smart cities from a European perspective. It presents both theoretical concepts as well as empirical studies and cases of smart city programs and their capacity to create value for citizens. The contributions in this book are a result of an increasing interest for this topic, supported by both national governments and international institutions. The book offers a large panorama of the most important aspects of smart cities evolution and implementation. 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