Abstract
We construct the new algebra A#H of an H-bimodule algebra A called the L-R twisted smash product, and give the duality theorem for L-R twisted smash products which extends the duality theorem for smash products given by Blattner and Montgomery. Furthermore, by using the duality theorem for L-R twisted smash products, we establish the relationship of global dimension between the H-bimodule algebra A and its L-R twisted smash product A#H.
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