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Commit 2021-09-26 12:40 865ad478

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feat(algebra/module/pointwise_pi): add a file with lemmas on smul_pi (#9369) Make a new file rather than add an import to either of algebra.pointwise or algebra.module.pi. From #2819

Estimated changes

added theorem smul_pi'
added theorem smul_pi
added theorem smul_pi_subset
added theorem smul_univ_pi