clopen.solutions

MI-03: the sharp constant for sums of complex contractions

Recorded by the registry's curators from GitHub; the authors did not submit it here.

George Stepaniants

Complete proof of the canonical odd-summand conjecture, via the stronger exact least admissible constant k/4 for every k≥2 in every positive dimension.

Claims

LEAN VERIFIED OP-00098 — Sharp additive triangle constant for an odd number of contractions
Full resolution · statement matched the canonical formalisation

Files and sources

Paper
OpenProblemsInNLA @ e375a6f, MI-03/lean/ ↗
Lean bundle
submissions/bundles/openproblemsinnla-mi-03-lean.tar.gz
Toolchain
leanprover/lean4:v4.33.1
Posted on GitHub
12 September 2026

Verification PASSED

Attempt
1
Toolchain
leanprover/lean4:v4.33.1
Auditor
v1 · modal
lake build
succeeded
Kernel replay
succeeded
Duration
0:02:03.940259

Declarations audited

DeclarationKindAxiomsUnused hypothesesCanonical
NLA.MI03.odd_contraction_conjecture theorem · Prop propext, Classical.choice, Quot.sound none matched
RegistryProblems.Problem_OP_00098 definition propext, Classical.choice, Quot.sound none no canonical statement

NLA.MI03.odd_contraction_conjecture

NLA.MI03.OddContractionConjecture

RegistryProblems.Problem_OP_00098

Prop

Build log

RegistryProblems: built against the registry's copy at 38ca23a44fc2b159a0c944d5c9af39a80eb601c2 rather than the pinned 545a5d18ad3917d52192c41ce172ec4b41945751. Statements are checked by content, not revision.
✔ [3036/3045] Built NLA.MI03.Definitions (6.1s)
✔ [3037/3045] Built NLA.MI03.Modulus (4.0s)
✔ [3038/3045] Built NLA.MI03.Roots (7.8s)
✔ [3039/3045] Built NLA.MI03.UpperBound (8.8s)
✔ [3040/3045] Built NLA.MI03.Witness (4.9s)
✔ [3041/3045] Built NLA.MI03.Sharpness (5.3s)
ℹ [3042/3045] Built NLA.MI03.Proof (4.5s)
info: NLA/MI03/Proof.lean:52:0: 'NLA.MI03.modulus_semantics_proved' depends on axioms: [propext, Classical.choice, Quot.sound]
info: NLA/MI03/Proof.lean:54:0: 'NLA.MI03.contraction_modulus_proved' depends on axioms: [propext, Classical.choice, Quot.sound]
info: NLA/MI03/Proof.lean:56:0: 'NLA.MI03.positive_decomposition_proved' depends on axioms: [propext, Classical.choice, Quot.sound]
info: NLA/MI03/Proof.lean:58:0: 'NLA.MI03.universal_upper_bound_proved' depends on axioms: [propext, Classical.choice, Quot.sound]
info: NLA/MI03/Proof.lean:60:0: 'NLA.MI03.root_of_unity_data_proved' depends on axioms: [propext, Classical.choice, Quot.sound]
info: NLA/MI03/Proof.lean:62:0: 'NLA.MI03.sharpness_witness_proved' depends on axioms: [propext, Classical.choice, Quot.sound]
info: NLA/MI03/Proof.lean:64:0: 'NLA.MI03.sharp_constant_proved' depends on axioms: [propext, Classical.choice, Quot.sound]
info: NLA/MI03/Proof.lean:66:0: 'NLA.MI03.odd_contraction_conjecture_proved' depends on axioms: [propext, Classical.choice, Quot.sound]
ℹ [3043/3045] Built Solution (4.1s)
info: Solution.lean:74:0: 'NLA.MI03.modulus_semantics' depends on axioms: [propext, Classical.choice, Quot.sound]
info: Solution.lean:76:0: 'NLA.MI03.contraction_modulus' depends on axioms: [propext, Classical.choice, Quot.sound]
info: Solution.lean:78:0: 'NLA.MI03.positive_decomposition' depends on axioms: [propext, Classical.choice, Quot.sound]
info: Solution.lean:80:0: 'NLA.MI03.universal_upper_bound' depends on axioms: [propext, Classical.choice, Quot.sound]
info: Solution.lean:82:0: 'NLA.MI03.root_of_unity_data' depends on axioms: [propext, Classical.choice, Quot.sound]
info: Solution.lean:84:0: 'NLA.MI03.sharpness_witness' depends on axioms: [propext, Classical.choice, Quot.sound]
info: Solution.lean:86:0: 'NLA.MI03.sharp_constant' depends on axioms: [propext, Classical.choice, Quot.sound]
info: Solution.lean:88:0: 'NLA.MI03.odd_contraction_conjecture' depends on axioms: [propext, Classical.choice, Quot.sound]
✔ [3044/3045] Built RegistryRecord (4.0s)
Build completed successfully (3045 jobs).