A function that is analytic on a connected domain is rigid: if two analytic functions agree on even a tiny patch — an arc, a sequence of points with a limit — they agree everywhere on the domain. There is no freedom left. That is the Identity Theorem, and the machinery that carries a locally-valid formula out to its unique global form is analytic continuation. SZL builds the same rigidity into provenance: a single verified signed receipt, chained by cryptographic structure, determines the integrity of the whole chain. Verify one, the rest follows.
The geometric series Σn≥0 zn converges only inside the unit disk
|z| < 1. There its partial sums SN(z) = 1 + z + z2 + … + zN
march toward a limit. Yet the function it represents, 1/(1−z), is perfectly well-defined
everywhere except z = 1. The series is the local data; 1/(1−z) is the
unique global continuation — the only analytic function on ℂ\{1} that agrees with the
series on the disk. Drag the controls: the partial sum below is computed honestly in JavaScript
(SN by direct summation), and compared against the closed form.
Tip: pick a z outside the disk — the
partial sums diverge (the series has nothing to say), but 1/(1−z) still returns the
single value the global function is forced to take there. That value is not invented; it is
determined by the local data through the structure.
The parallel below is a metaphor we find clarifying, not a mathematical claim that receipts are analytic functions. The left column is the genuine theorem; the right column is the live SZL artifact it inspired. We label the bridge illustrative on purpose — doctrine v11, honesty over checklist.
ℂ\{1} is the one and only
1/(1−z). Local data has determined the global truth.A judge can click straight through from the picture to the live, recomputed proof — no fabricated values anywhere along the way.
Analytic-continuation framing after Daniel Buchta, "Mathematical Thinking Series No. 17: Analytic Continuation — Local Data Determines Global Truth." This visualization is illustrative; the governing claim it mirrors (verifiable hash-chained receipts) is the live, real artifact. We do not claim this page proves anything — the partial sums are honest arithmetic, the bridge is an explicitly illustrative metaphor, and the only proof on offer is the recomputable Khipu chain linked above. External ideas are cited, never claimed as ours (doctrine v11).
Σn≥0 zn = 1/(1−z) for |z| < 1; the right-hand side is the unique analytic continuation to ℂ\{1}.