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Commit 2021-05-07 09:30 565310f1

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feat(data/nat/cast): pi.coe_nat and pi.nat_apply (#7492)

Estimated changes

Modified src/data/int/cast.lean

added theorem pi.coe_int

added theorem pi.int_apply

Modified src/data/nat/cast.lean

added theorem pi.coe_nat

added theorem pi.nat_apply