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Diff — 1000 (number)

Revision #1857 → #2386 · back to history

modified1275 = 50th triangular number / sum of first 50 naturals48ea5ee62801
FieldFrom #1857To #2386
mathlib.declGauss.sum_range_idFinset.sum_range_id
noteMathlib has `Finset.sum_range_id` giving ∑ k in range n, k = n*(n-1)/2 from which the value 1275 follows, but no instance lemma names 1275.Mathlib has `Finset.sum_range_id` giving ∑ k in range n, k = n*(n-1)/2 from which the value 1275 follows, but no instance lemma names 1275. (Moderated: corrected decl name from `Gauss.sum_range_id`.)
provenanceaiai-moderated