02855nam a22004575i 4500001001800000003000900018005001700027007001500044008004100059020001800100020001900118024003500137082001500172100003200187245016100219264004200380300002100422336002600443337002600469338003600495347002400531490003500555505057800590520071501168650001701883650002501900650001301925650002801938650001701966650002401983650003602007650003402043700003502077700003102112700002802143710003402171773002002205776003602225830003502261856010102296978-0-8176-4875-6DE-He21320260521092032.0cr nn 008mamaa100301s2010    xxu|    s    |||| 0|eng d  a9780817648756  a997808176487567 a10.1007/978-0-8176-4875-62doi04a516.352231 aCampbell, H. E. A.eeditor.10aSymmetry and Spacesh[electronic resource] :bIn Honor of Gerry Schwarz /cedited by H. E. A. Campbell, Aloysius G. Helminck, Hanspeter Kraft, David Wehlau. 1aBoston :bBirkhäuser Boston,c2010.  bonline resource.  atextbtxt2rdacontent  acomputerbc2rdamedia  aonline resourcebcr2rdacarrier  atext filebPDF2rda1 aProgress in Mathematics ;v2780 aSome Basic Results on Actions of Nonaffine Algebraic Groups -- On Chevalley-Shephard-Todd's Theorem in Positive Characteristic -- Families of Affine Fibrations -- On the Depth of Modular Invariant Rings for the Groups × -- Kählerian Reduction in Steps -- On Orbit Decompositions for Symmetric -Varieties -- Root Systems for Levi Factors and Borel-de Siebenthal Theory -- Polarizations and Nullcone of Representations of Reductive Groups -- Decomposing Symmetric Powers of Certain Modular Representations of Cyclic Groups -- Differential Operators on Grassmann Varieties.  aA group of Gerry Schwarz's colleagues and collaborators gathered at the Fields Institute in Toronto for a mathematical festschrift in honor of his 60th birthday. This volume is an outgrowth of that event, covering the wide range of mathematics to which Gerry Schwarz has either made fundamental contributions or stimulated others to pursue. The articles are a sampling of modern day algebraic geometry with associated group actions from its leading experts, with a particular focus on characteristic 0 and modular invariant theory. Contributors: M. Brion A. Broer D. Daigle J. Elmer P. Fleischmann G. Freudenberg D. Greb P. Heinzner A. Helminck B. Kostant H. Kraft R. J. Shank W. Traves N. R. Wallach D. Wehlau 0aMATHEMATICS. 0aGEOMETRY, ALGEBRAIC. 0aALGEBRA. 0aFIELD THEORY (PHYSICS).14aMATHEMATICS.24aALGEBRAIC GEOMETRY.24aCOMMUTATIVE RINGS AND ALGEBRAS.24aFIELD THEORY AND POLYNOMIALS.1 aHelminck, Aloysius G.eeditor.1 aKraft, Hanspeter.eeditor.1 aWehlau, David.eeditor.2 aSpringerLink (Online service)0 tSpringer eBooks08iPrinted edition:z9780817648749 0aProgress in Mathematics ;v27840uhttp://dx.doi.org/10.1007/978-0-8176-4875-6zVer el texto completo en las instalaciones del CICY