Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2019-05-05 02:40 fc8b08b3

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feat(data/set/basic): prod_subset_iff (#980)

feat(data/set/basic): prod_subset_iff
syntax

Estimated changes

Modified src/data/set/basic.lean

added theorem set.prod_subset_iff