image image-Poincaré supergravities from Lie algebra expansions Original Research Article

We use the expansion of superalgebras procedure (summarized in the text) to derive Chern–Simons (CS) actions for the image-Poincaré supergravities in three-dimensional spacetimes. After deriving the action for the image-Poincaré supergravity as a CS theory for the expansion image of image, we find the general image-Poincaré superalgebras and their associated image supergravity actions as CS gauge theories from an expansion of the simple image superalgebras, namely image.