[Merged by Bors] - feat(algebra/big_operators/order): add fintype.sum_mono and fintype.sum_strict_mono #6040
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| namespace fintype | ||
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| variables [fintype α] | ||
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| @[mono] lemma sum_mono [ordered_add_comm_monoid β] : monotone (λ f : α → β, ∑ x, f x) := | ||
| λ f g hfg, finset.sum_le_sum $ λ x _, hfg x |
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This is in the fintype namespace since we already have lemmas called fintype.sum_bool instead of finset.sum_univ_bool
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leon pi types #6023