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Commit 2021-06-02 13:27 173bc4c2

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feat(algebra/algebra/subalgebra): add subalgebra.prod (#7782) We add a basic API for product of subalgebras.

Estimated changes

added theorem subalgebra.coe_prod
added theorem subalgebra.mem_prod
added def subalgebra.prod
added theorem subalgebra.prod_mono
added theorem subalgebra.prod_top
added theorem algebra.coe_inf
added theorem algebra.prod_inf_prod