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Weak Lie 2-bialgebra (1109.2290v3)
Published 11 Sep 2011 in math-ph, math.MP, and math.RA
Abstract: We introduce the notion of weak Lie 2-bialgebra. Roughly, a weak Lie 2-bialgebra is a pair of compatible 2-term $L_\infty$-algebra structures on a vector space and its dual. The compatibility condition is described in terms of the big bracket. We prove that (strict) Lie 2-bialgebras are in one-one correspondence with crossed modules of Lie bialgebras.
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