Einstein 4-manifolds and nonpositive isotropic curvature |
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| Authors: | A. BrasilJr. E. Costa F. Vitório |
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| Affiliation: | 1.Department of Mathematics, Faculty of Science and Arts,Namik Kemal University,Tekirdag,Turkey;2.Pure Mathematics Research Centre,Queen’s University Belfast,Belfast,Northern Ireland |
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| Abstract: | We give conditions for the linear span of the positive L-weakly compact (resp. M-weakly compact) operators to be a Banach lattice under the regular norm, for that Banach lattice to have an order continuous norm, to be an AL-space or an AM-space. |
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