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DefinitionDefinition: Literature-sourcedProof: Not applicablePipeline-generated
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.

Braiding on the module category and triangular structures

Definition

Let H be a Hopf algebra over a field k and let H-Mod denote the category of all left H-modules and all H-linear maps, with tensor action and associators as in The module category of a bialgebra and its tensor action and Bialgebra module tensor actions and their coherence. A braiding on this category is a family of H-linear isomorphisms cV,W:V⊗W⟶W⊗V for all left H-modules V,W, natural in both variables, for which the following equalities hold after inserting the canonical associators of the module category: cU,V⊗W=(id⁡V⊗cU,W)∘(cU,V⊗id⁡W),cU⊗V,W=(cU,W⊗id⁡V)∘(id⁡U⊗cV,W). A quasitriangular structure R is triangular if R21R=1H⊗1H. A braiding is symmetric if cW,V∘cV,W=id⁡V⊗W for every V,W. No finite-dimensional restriction is imposed on H or on the modules in H-Mod.

Remarks

For R=∑iai⊗bi, the candidate braiding associated with R is cV,W(v⊗w)=∑ibiw⊗aiv. Its well-definedness, module-linearity, naturality, hexagons, and the converse reconstruction from regular modules are supplied by A quasitriangular structure gives and is recovered from a module braiding ↗.

Depends on

Used by

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