We study Lie bialgebroid crossed modules which are pairs of Lie algebroid crossed modules in duality that canonically give rise to Lie bialgebroids. A one-one correspondence between such Lie bialgebroid crossed modules and co-quadratic Manin triples (K,P,Q) is established, where K is a co-quadratic Lie algebroid and (P,Q) is a pair of transverse Dirac structures in K. This is a joint work with Yu Qiao and Yanbin Yin.

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