Inventiones mathematicae

最新文章

• Relative regulators of number fields AI翻译
  作者：Friedman, E; Skoruppa, NP
  作者单位：Universidad de Chile; Universite de Bordeaux
• On blowup formulae for the S-duality conjecture of Vafa and Witten AI翻译
  作者：Li, WP; Qin, ZB
  作者单位：Hong Kong University of Science & Technology; Oklahoma State University System; Oklahoma State University - Stillwater
• The variety of circular complexes and F-splitting AI翻译
  作者：Mehta, VB; Trivedi, V
  作者单位：Tata Institute of Fundamental Research (TIFR)
• Linear transvection groups and embedded polar spaces AI翻译
  作者：Cuypers, H; Steinbach, A
  作者单位：Eindhoven University of Technology; Justus Liebig University Giessen
  摘要：Most classical groups arising from (anti-) hermitian forms or (pseudo-) quadratic forms contain so-called isotropic transvections. The isotropic transvection subgroups of these classical groups, i.e., the subgroups generated by all isotropic transvections with a fixed axis, form a class Sigma of abelian subgroups which is a class of abstract transvection groups in the sense of Timmesfeld [24]. In this paper we give a common characterization of all these classical groups with isotropic transvec...
• Cyclic surgery, degrees of maps of character curves, and volume rigidity for hyperbolic manifolds AI翻译
  作者：Dunfield, NM
  作者单位：University of Chicago
• Geometry of the complex of curves I: Hyperbolicity AI翻译
  作者：Masur, HA; Minsky, YN
  作者单位：University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; State University of New York (SUNY) System; Stony Brook University
• On denominators of the Kontsevich integral and the universal perturbative invariant of 3-manifolds AI翻译
  作者：Le, TTQ
  作者单位：State University of New York (SUNY) System; University at Buffalo, SUNY
  摘要：The integrality of the Kontsevich integral and perturbative invariants is discussed. It is shown that the denominator of the degree n part of the Kontsevich integral of any knot or link is a divisor of (2!3!... n!)(4)(n + 1)!. We prove this by establishing the existence of a Drinfeld's associator in the space of chord diagrams with special denominators. We also show that the denominator of the degree n part of the universal perturbative invariant of homology 3-spheres is not divisible by any p...
• Rigidity of irreducible Hermitian symmetric spaces of the compact type under Kahler deformation AI翻译
  作者：Hwang, JM; Mok, N
  作者单位：Seoul National University (SNU); University of Hong Kong
• Multiplicity-free Hamiltonian actions need not be Kahler AI翻译
  作者：Woodward, C
  作者单位：Harvard University
  摘要：Multiplicity-free actions are symplectic manifolds with a very high degree of symmetry. Delzant [2] showed that all compact multiplicity-free torus actions admit compatible Kahler structures, and are therefore toric varieties. In this note we show that Delzant's result does not generalize to the non-abelian case. Our examples are constructed by applying U(2)-equivariant symplectic surgery to the flag variety U(3)/T-3. We then show that these actions fail a criterion which Tolman [9] shows is n...
• Topology of symplectomorphism groups of S2 x S2 AI翻译
  作者：Abreu, M
  作者单位：Institute for Advanced Study - USA