Results 101 to 110 of about 146 (116)
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Three-step Harmonic Solvmanifolds
Geometriae Dedicata, 2003The authors define a solvmanifold as a connected and simply connected solvable Lie group together with a left-invariant metric. Damek-Ricci spaces are examples of solvmanifolds. These spaces appeared as counter-examples for the Lichnerowicz conjecture, namely, that every harmonic Riemannian manifold would be locally isometric to a two-point homogeneous
Benson, Chal +2 more
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Characteristic Classes of Compact Solvmanifolds
The Annals of Mathematics, 1962A solvmanifold (nilmanifold) is the homogeneous space of a connected solvable (nilpotent) Lie group. A theorem of A. I. Malcev [3] states that a nilmanifold can always be expressed as the quotient of a nilpotent Lie group by a discrete subgroup. From this it follows easily that nilmanifolds are parallelizable.
Auslander, Louis, Szczarba, R. H.
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Lefschetz and Nielsen coincidence numbers on nilmanifolds and solvmanifolds
Suppose M1,M2 are compact, connected orientable manifolds of the same dimension. Then for all pairs of maps ƒ,g:M1→M2, the Nielsen coincidence number N(ƒ,g) and the Lefschetz coincidence number L(ƒ,g) are measures of the number of coincidences of ƒ and g:
Christopher K. McCord +1 more
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INFRA-SOLVMANIFOLDS OF TYPE (R)
The Quarterly Journal of Mathematics, 1995Für eine einfach zusammenhängende auflösbare Liesche Gruppe \(G\) wird das semidirekte Produkt \(\text{Aff} (G):=\Aut (G) \ltimes G\) als affine Gruppe von \(G\) bezeichnet. Ist nun \(\Gamma\) ein cokompaktes Gitter in \(G\) und \(\pi\leq\text{Aff}(G)\) eine torsionsfreie endliche Erweiterung von \(\Gamma\), \(\Gamma \vartriangleleft \pi\), so nennt ...
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On Formality and Solvmanifolds [PDF]
Topology of symplectic manifolds is nowadays a subject of intensive development. The simplest examples of such manifolds are Kähler manifolds and an important property of the latter is their formality. Thus, a possible way of constructing symplectic manifolds with no Kähler structure is to find such ones which are not formal. M. Fernández und V.
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Curvatures on Vaisman solvmanifolds
Kodai Mathematical JournalA locally conformal Kähler manifold \((M^{2n}, g, J)\) is called a Vaisman manifold if its Lee form is parallel with respect to the Levi-Civita connection \(\nabla \) of the metric \(g\). Denote \(H\) the \((2n+1)\)-dimensional Heisenberg Lie group and \(\Gamma \) a lattice in \(H\). A Kodaira-Thurston manifold is a nilmanifold \(S^1 \times \Gamma /H\).
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Splitting Theorems and the Structure of Solvmanifolds
The Annals of Mathematics, 1970Auslander, Louis, Tolimieri, Richard
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