[Merged by Bors] - feat: When the sum of a nonneg function is zero #7372
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YaelDillies
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Sep 27, 2023
Also fix implicitness of arguments to `Finset.sum_singleton`.
eric-wieser
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Sep 27, 2023
| Finset.prod_le_prod' fun x _ ↦ hfg x | ||
| #align fintype.prod_mono' Fintype.prod_mono' | ||
| #align fintype.sum_mono Fintype.sum_mono | ||
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| @[to_additive sum_nonneg] | ||
| lemma one_le_prod (hf : 1 ≤ f) : 1 ≤ ∏ i, f i := Finset.one_le_prod' λ _ _ ↦ hf _ |
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| lemma one_le_prod (hf : 1 ≤ f) : 1 ≤ ∏ i, f i := Finset.one_le_prod' λ _ _ ↦ hf _ | |
| lemma one_le_prod (hf : 1 ≤ f) : 1 ≤ ∏ i, f i := Finset.one_le_prod' fun _ _ ↦ hf _ |
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Also fix implicitness of arguments to
Finset.sum_singleton.