LEADER 04347nam 2200733Ia 450 001 9911138251003321 005 20260415133918.0 010 $a9786612194825 010 $a9781282194823 010 $a1282194828 010 $a9783110199703 010 $a311019970X 024 7 $a10.1515/9783110199703 035 $a(CKB)1000000000335184 035 $a(EBL)280159 035 $a(OCoLC)476023249 035 $a(SSID)ssj0000229106 035 $a(PQKBManifestationID)11188415 035 $a(PQKBTitleCode)TC0000229106 035 $a(PQKBWorkID)10155935 035 $a(PQKB)10675981 035 $a(MiAaPQ)EBC280159 035 $a(WaSeSS)Ind00014110 035 $a(DE-B1597)19797 035 $a(OCoLC)979954955 035 $a(DE-B1597)9783110199703 035 $a(Au-PeEL)EBL280159 035 $a(CaPaEBR)ebr10154770 035 $a(CaONFJC)MIL219482 035 $a(OCoLC)228144658 035 $a(Perlego)651303 035 $a(EXLCZ)991000000000335184 100 $a20050902d2005 uy 0 101 0 $aeng 135 $aurnn#---|u||u 181 $ctxt 182 $cc 183 $acr 200 00$aProjective varieties with unexpected properties $ea volume in memory of Giuseppe Veronese : proceedings of the international conference "Varieties with Unexpected Properties," Siena, Italy, June 8-13, 2004 /$fedited by Ciro Ciliberto ... [et al.] 205 $a1st ed. 210 $aBerlin ;$aNew York $cWalter de Gruyter$d2005 215 $a1 online resource (400 p.) 225 0 $aDe Gruyter Proceedings in Mathematics 300 $aDescription based upon print version of record. 311 0 $a9783110181609 311 0 $a3110181606 327 $tFront matter --$tContents --$tCharacterization of Veronese varieties via projection in Grassmannians --$tBirational geometry of defective varieties --$tFano three-folds as hyperplane sections --$tTriple points imposing triple divisors and the defective hierarchy --$tM15 is rationally connected --$tCodimension one decompositions and Chow varieties --$tHigher secant varieties of Segre-Veronese varieties --$tAn appendix to a paper of Catalisano, Geramita, Gimigliano: The Hilbert function of generic sets of 2-fat points in P1 × P1 --$tThe 3-cuspidal quartic and braid monodromy of degree 4 coverings --$tOn the classification of defective three-folds --$tMatching conditions for degenerating plane curves and applications --$tNegative curves on very general blow-ups of P2 --$tLinear congruences and hyperbolic systems of conservation laws --$tA note on the very ampleness of complete linear systems on blowings-up of P3 --$tPhylogenetic algebraic geometry --$tSome results on fat points whose support is a complete intersection minus a point --$tThe (unexpected) importance of knowing ? --$tHilbert functions of Gorenstein algebras associated to a pencil of forms --$tVarieties of reductions for gln --$tBirational geometry of rationally connected manifolds via quasi-lines --$tOn the discriminant of spanned line bundles --$tMultisecant lines to projective varieties --$tCycle map on Hilbert schemes of nodal curves --$tBack matter 330 $aThis volume contains refereed papers related to the lectures and talks given at a conference held in Siena (Italy) in June 2004. Also included are research papers that grew out of discussions among the participants and their collaborators. All the papers are research papers, but some of them also contain expository sections which aim to update the state of the art on the classical subject of special projective varieties and their applications and new trends like phylogenetic algebraic geometry. The topic of secant varieties and the classification of defective varieties is central and ubiquitous 410 3$aDe Gruyter Proceedings in Mathematics 606 $aAlgebraic varieties$vCongresses 606 $aGeometry, Projective$vCongresses 615 0$aAlgebraic varieties 615 0$aGeometry, Projective 676 $a516.3/53 686 $aSD 2004$2rvk 701 $aVeronese$b Giuseppe$f1854-1917.$056376 701 $aCiliberto$b C$g(Ciro),$f1950-$042512 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9911138251003321 996 $aProjective varieties with unexpected properties$94831919 997 $aUNINA