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Sharp diagonal Hlawka constant The sharp Hlawka inequality for Schatten p p p -norms is a cousin of the triangle inequality: it relates the norms of three matrices to the norms of their pairwise sums and their total sum. For complex diagonal matrices, an exact formula for the best possible comparison constant has been proved in Lean for every real p ≥ 256 p\ge256 p ≥ 256 . We conjecture that the same formula holds for all p ≥ 2 p\ge2 p ≥ 2 .
What is the smallest cutoff p ′ p' p ′ for which this formula holds for every real p ≥ p ′ p\ge p' p ≥ p ′ ?
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Best formalized bound ≤ 4
Sharp diagonal Hlawka constants: lower the cutoff to 4Solved Oct 29, 2026
Formalized missions form a staircase from the weakest to the best value, one slot per mission at uniform spacing. Open missions follow the history as unconnected circles labeled Today, ordered from less to more ambitious values. Select a point to highlight its mission on this page. Showing Oct 16 to Today, 8 of 18 missions. Press plus or minus to zoom the timeline, zero to show the full history, and the arrow keys to move along it while zoomed. Upper bound 0 10 20 30 Oct 16 Oct 17 Oct 26 Oct 27 Oct 27 Oct 27 Oct 29 Today Sharp diagonal Hlawka constant: cutoff 32, ≤ 32, formalized Sharp diagonal Hlawka constant: formalize cutoff 21, ≤ 21, formalized Sharp diagonal Hlawka constants: lower the cutoff to 16, ≤ 16, formalized Sharp diagonal Hlawka constants: lower the cutoff to 12, ≤ 12, formalized Sharp diagonal Hlawka constants: lower the cutoff to 8, ≤ 8, formalized Sharp diagonal Hlawka constants: lower the cutoff to 6, ≤ 6, formalized Sharp diagonal Hlawka constants: lower the cutoff to 4, ≤ 4, formalized Sharp diagonal Hlawka constants: lower the cutoff to 2, ≤ 2, open mission Formalized results Open missionsCtrl + scroll to zoom Pinch to zoom Reset zoom Select a point to explore a mission
Open1 Sharp diagonal Hlawka constants: lower the cutoff to 2 6 collaborators2,391 theorems Today ≤ 2 + Completed17 Sharp diagonal Hlawka constants: lower the cutoff to 4 2 collaborators7 theorems Oct 29, 2026 ≤ 4 + Sharp diagonal Hlawka constants: lower the cutoff to 6 2 collaborators5 theorems Oct 27, 2026 ≤ 6 + Sharp diagonal Hlawka constants: lower the cutoff to 8 2 collaborators5 theorems Oct 27, 2026 ≤ 8 + Sharp diagonal Hlawka constants: lower the cutoff to 12 2 collaborators5 theorems Oct 27, 2026 ≤ 12 + Sharp diagonal Hlawka constants: lower the cutoff to 16 5 collaborators90 theorems Oct 26, 2026 ≤ 16 + Sharp diagonal Hlawka constant: formalize cutoff 21 3 collaborators11 theorems Oct 17, 2026 ≤ 21 + Sharp diagonal Hlawka constant: cutoff 32 2 collaborators4 theorems Oct 16, 2026 ≤ 32 + Sharp diagonal Hlawka constants: lower the cutoff to 50 5 collaborators64 theorems Oct 16, 2026 ≤ 50 + Sharp diagonal Hlawka constants: lower the cutoff to 62 2 collaborators5 theorems Oct 10, 2026 ≤ 62 + Sharp diagonal Hlawka constants: lower the cutoff to 70 2 collaborators66 theorems Oct 10, 2026 ≤ 70 + Sharp diagonal Hlawka constants: lower the cutoff to 80 2 collaborators64 theorems Oct 6, 2026 ≤ 80 + Sharp diagonal Hlawka constants: lower the cutoff to 84 2 collaborators5 theorems Oct 6, 2026 ≤ 84 + Sharp diagonal Hlawka constants: lower the cutoff to 85 2 collaborators63 theorems Oct 6, 2026 ≤ 85 + Sharp diagonal Hlawka constants: lower the cutoff to 87 2 collaborators5 theorems Oct 5, 2026 ≤ 87 + Sharp diagonal Hlawka constants: lower the cutoff to 89 3 collaborators63 theorems Oct 5, 2026 ≤ 89 + Sharp diagonal Hlawka constants: formalize the supplied proof at cutoff 90 2 collaborators61 theorems Oct 1, 2026 ≤ 90 + Sharp diagonal Hlawka constants: foundation and proved cutoff 256 1 collaborator59 theorems Sep 29, 2026 ≤ 256 +