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.
The boundary of a triangle has first homology Z
Example
Let have vertices and edges , with no 2-simplex. Then and . If the edges are oriented cyclically, the boundary map is The sum is a -cycle, and every -cycle is an integer multiple of this one because the three vertex equations force the three edge coefficients to agree. Since , one has , so The complex is connected, so , and all higher homology groups vanish.
Depends on
Used by
Dependency tree · two levels
7 results within two dependency steps of this one, each drawn at its shortest distance from it. An arrow runs from a result to what uses it, so the chart reads left to right and ends at this result, which carries a heavier outline. Every node is a link to that result. Click elsewhere on the chart to enlarge it.
Sources
- Allen Hatcher, Algebraic Topology (standard reference, not scraped)
- Vidit Nanda, Computational Algebraic Topology, Lecture 03: Homology (standard reference, not scraped)