Alphabeta Math
DefinitionDefinition: Literature-sourcedProof: Not applicablePipeline-generatedjudge pass (gpt-6-luna)
How statement and proof provenance work

The first chip identifies the source of the statement or construction; the second identifies the source of its local proof or verification.

  • Literature-sourced: the exact statement appears in a cited source; only wording and notation differ.
  • AI-adapted: a semantically identical restatement of literature-sourced material, modulo indexing, notation, and boundary cases adopted by the library.
  • AI-generated: a genuinely novel statement formulated by AI, with no source for the claim itself.

These labels describe origin, not correctness: citations and verification chips remain separate evidence.

Finite Riesz synthesis matrix and biorthogonal coefficient coordinates

Definition

Let V∈RN×N be invertible and suppose there are constants 0<A≤B<∞ such that A∥z∥22≤∥Vz∥22≤B∥z∥22for every z∈RN. Call V a finite Riesz synthesis matrix and call A,B Riesz bounds. For a signal x∈RN, the analysis coefficients are c=V−1x and synthesis is x=Vc. The inverse analysis matrix and synthesis matrix form a biorthogonal coordinate pair; unless A=B=1, coefficient truncation errors need not equal Euclidean tail energy.

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