Commit 2022-09-20 11:17 744170a9

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feat(data/pfun): Product of partial functions (#15389) Define pfun.prod : (α →. γ) → (β →. δ) → α × β →. γ × δ.

Estimated changes

added theorem pfun.dom_prod_lift
added theorem pfun.dom_prod_map
added theorem pfun.get_prod_lift
added theorem pfun.get_prod_map
added theorem pfun.mem_prod_lift
added theorem pfun.mem_prod_map
added def pfun.prod_lift
added theorem pfun.prod_lift_apply
added def pfun.prod_map
added theorem pfun.prod_map_apply
added theorem pfun.prod_map_id_id