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Mathlib v3 is deprecated.
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Theorem
ordinal.ne_zero_of_out_nonempty
Modification history
2022-07-06 21:58
src/set_theory/ordinal/basic.lean
chore(set_theory/ordinal/basic): clean up `ordinal.card` API (#15147) …
Added
ordinal.ne_zero_of_out_nonempty
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