mathlib
fc6f9673 - chore(ring_theory/hahn_series): emb_domain_add needs only add_monoid, not semiring (#7802)

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4 years ago
chore(ring_theory/hahn_series): emb_domain_add needs only add_monoid, not semiring (#7802) This is my fault, the lemma ended up in the wrong place in #7737
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