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Abstract
In this project we study equivariant cohomology of Lie 2-groups acting on Lie groupoids. We investigate how the models of equivariant cohomology studied by Barbosa and Neumann (arXiv:1912.00316) extend to this setting. Our main goal is the study of equivariant cohomology of differentiable stacks with symmetries, hence we investigate the corresponding Morita invariance of the equivariant c…