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 standard circle loops for
Definition
Let . For every integer , define and .
The function is continuous by Sums, scalar multiples, products, absolute values, maxima, minima and quotients with nonvanishing denominator of continuous functions are continuous, as are constants, the identity and every polynomial function, and is continuous because it is the quotient projection of The circle as with basepoint . Hence is continuous by Continuity may be checked on any open cover, and on any finite closed cover; composites of continuous maps are continuous. Moreover,
Thus is a based loop at in the sense of Based loops and the fundamental group. This definition includes , when the loop is constant, and all negative integers.
Depends on
The circle as with basepoint
Based loops and the fundamental group
Sums, scalar multiples, products, absolute values, maxima, minima and quotients with nonvanishing denominator of continuous functions are continuous, as are constants, the identity and every polynomial function
Continuity may be checked on any open cover, and on any finite closed cover; composites of continuous maps are continuous