Alphabeta Math
DefinitionDefinition: Literature-sourcedProof: Not applicablePipeline-generatedjudge pass (gpt-5.6-terra)audited 2026-08-28
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 holomorphic charts on the Riemann sphere, with holomorphy and poles at infinity

Definition

Let U0:=C^∖{∞},U∞:=C^∖{0}. Define charts ϕ0:U0→C, ϕ0(z)=z, and ϕ∞:U∞→C,ϕ∞(z)={1/z,z∈C×,0,z=∞. On the overlap U0∩U∞=C× the transition maps are ϕ∞∘ϕ0−1(w)=1/w,ϕ0∘ϕ∞−1(w)=1/w, which are holomorphic on C×. These are the standard holomorphic charts of the Riemann sphere.

If V⊆C^ is open and f:V→C, then f is holomorphic at ∞ when ∞∈V and the chart expression F(w):=f(ϕ∞−1(w))={f(1/w),w≠0,f(∞),w=0 is holomorphic at 0. A scalar-valued function defined on a punctured neighbourhood of ∞ has a pole at ∞ when the punctured chart expression w↦f(1/w) has a pole at 0 in the sense of Isolated singularities: removable, poles, and essential singularities.

Depends on

Used by

…and 1 more result.

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