Give an example of a valid hypothesis right of colon#719
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fpvandoorn merged 2 commits intoleanprover-community:lean4from Oct 27, 2025
Merged
Give an example of a valid hypothesis right of colon#719fpvandoorn merged 2 commits intoleanprover-community:lean4from
fpvandoorn merged 2 commits intoleanprover-community:lean4from
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adomani
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Oct 24, 2025
adomani
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Oct 24, 2025
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| lemma zero_le : ∀ n : ℕ, 0 ≤ n | ||
| | 0 => le_rfl | ||
| | n + 1 => add_nonneg (zero_le n) zero_le_one |
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Suggested change
| lemma zero_le : ∀ n : ℕ, 0 ≤ n | |
| | 0 => le_rfl | |
| | n + 1 => add_nonneg (zero_le n) zero_le_one | |
| lemma zero_le : ∀ n : ℕ, True | |
| | 0 => trivial | |
| | n + 1 => trivial |
if you prefer a simpler example!
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Oh I think that's too simple, because then the pattern-matching plays no role and that's confusing.
Co-authored-by: damiano <adomani@gmail.com>
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Adding a link to a discussion of this: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Style.3A.20hypothesis.20left.20of.20colon.20vs.20pattern.20matching |
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LGTM |
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