arXiv · math/0406502
We show that the cobar construction of a DG-bialgebra is a homotopy G-algebra. This implies that the bar construction of this cobar is a DG-bialgebra as well.
Tornike Kadeishvili. 2004-06-24. On the cobar construction of a bialgebra. https://arxiv.org/abs/math/0406502
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