Superalgebra Realization of the 3-algebras in N=6, 8 Chern-Simons-matter Theories

We use superalgebras to realize the 3-algebras used to construct N=6, 8 Chern-Simons-matter (CSM) theories. We demonstrate that the superalgebra realization of the 3-algebras provides a unified framework for classifying the gauge groups of the N \geq 5 theories based on 3-algebras. Using this realization, we rederive the ordinary Lie algebra construction of the general N=6 CSM theory from its 3-algebra counterpart, and reproduce all known examples as well. In particular, we explicitly construct the Nambu 3-bracket in terms of a double graded commutator of PSU(2|2). The N = 8 theory of Bagger, Lambert and Gustavsson (BLG) with SO(4) gauge group is constructed by using several different ways. A quantization scheme for the 3-brackets is proposed by promoting the double graded commutators as quantum mechanical double graded commutators.Comment: 29 pages, minor changes, published in JM

cis-Aqua­bis(2,4-dichloro-6-formyl­phenolato-κ2 O,O′)(N,N-dimethyl­formamide-κO)nickel(II)

In the title compound, [Ni(C7H3Cl2O2)2(C3H7NO)(H2O)], the NiII ion is coordinated by four O atoms from two bidentate 2,4-dichloro-6-formyl­phenolate ligands, one O atom from a water ligand and one O atom from a dimethyl­formamide ligand in a slightly distorted octa­hedral environment. In the crystal structure, centrosymmetric dimers are formed though O—H⋯O and O—H⋯Cl hydrogen bonds; π–π stacking inter­actions, with a centroid–centroid distance of 3.796 (2) Å, are also found