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.
Limitwise-nullhomotopy predicate on based loops
Definition
Assume Countable Choice . Let be a transversely oriented codimension-one foliation, a leaf, , and one of its two sides. For a based loop whose class belongs to , and for a chosen sufficiently short normal fence on side , define the representative-level predicate to hold when every sufficiently small positive normal displacement is null- homotopic in its leaf. At this stage is a predicate on a specified loop and fence; no representative-independence is part of this definition.
For clarity, a displacement is obtained by starting at a chosen positive point of the base transversal and continuing the loop plaque by plaque through a finite chart subdivision. Within each chart its transverse label is held fixed; the fence specifies the nearby endpoint in that plaque. Since , the return map is the identity on a sufficiently short interval on side j, so these displacements are closed loops. The quantifier means: there exists ε₀>0 such that every displacement with 0<ε<ε₀ is nullhomotopic in its own leaf. No uniform bound on the filling disks is part of the definition.
Depends on
Used by
Dependency tree · two levels
15 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
- S. P. Novikov, The Topology of Foliations (English translation by J. A. Zilber; complete PDF of the translation) (standard reference, not scraped)