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Question 23876: Whole Factorial Laws and Complete Shared-Prefix Tails Keep Their Different Radii

On this page
  1. Original question and givens
  2. Definition and scope
  3. Step-by-step derivation
  4. Reverse checks
  5. Result
  6. This question review and source binding

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R0046-23876 · q-20261014-advance-20261112-r05-power-series-radius-of-convergence-0076

Original question and givens

Use mode=zero_radius, positive scale=1, source prefix_length=0, first_ratio=1, second_ratio=1. zero_radius/infinite_radius require the canonical unused-field sentinels prefix0 and ratios1. Give (mode, scale, coefficient_law, radius, symbolic_certificate, certificate).

  • G001 — Use mode=zero_radius, positive scale=1, source prefix_length=0, first_ratio=1, second_ratio=1. zero_radius/infinite_radius require the canonical unused-field sentinels prefix0 and ratios1. Give (mode, scale, coefficient_law, radius, symbolic_certificate, certificate).

Definition and scope

Use the original question domain, assumptions and cited MKO definitions. This item has second-context mathematical and bilingual review, with the model, answer and every arithmetic step independently recomputed from the original parameters; the source question remains a candidate.

Step-by-step derivation

S001 · implies

Before

source operation=radius-zero-infinity-prefix-boundary;original snapshot and mathematics retained

After

explicit ordered source output fields=[mode, scale, coefficient_law, radius, symbolic_certificate, certificate]

Conditions: none

Keep the source snapshot while listing ordered fields without JavaScript.Radius uses its original mode to select6 or11 fields without padding;distinguish nonclaims from actual negations.

Step identifiers and dependencies

Rule: source_ordered_interface_explicit_without_javascript · Uses: G001

S002 · implies

Before

ORIGINAL mode=zero_radius,positive scale=1;unused-field sentinels prefix0,ratios1/1

After

WHOLE a_n=scale*n! for EVERY n>=0;for any nonzero displacement t,absolute term ratio=|t|*(n+1) grows without bound,so terms cannot tend0;at t0 the series is finite,thus R0

Conditions: none

Radius0 is legal and does not mean divergence at the center.Nonzero scale and the whole factorial law control all later terms,not a finite prefix.

Step identifiers and dependencies

Rule: radius_WHOLE_factorial_growth_radius0_not_prefix_guess · Uses: G001, S001

Reverse checks

  • S002 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S001 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.

Result

(zero_radius, 1, a_n=1*n!_for_every_n>=0, 0, Yes, factorial_growth_gives_radius_zero)

The full substitutions and premise checks give the original answer; source identity,format and status are unchanged.

This question review and source binding

Review date: 2026-10-26

Original questions, answers, step expressions, numeric ASTs and historical records are retained. Source candidate labels remain historical and are not overwritten as formal proof.

Source hashes and review receipts
  • input commit: 0f7be61e2c22317a4075561dc822c87d881a50db
  • original question SHA-256: 27d8b006ae63b87a9cb416f3438bff0df516b4340943e09e384fb139e65779e4
  • candidate record SHA-256: f73d73b5c11fa448b14c00c42afe5c5d0553c017b400e3e7850bcfd7a3a6f148
  • semantic review receipt SHA-256: a7c0d888ade6d307703c4222c4137c78c0d2448babdcba2fa3446fe6fdd343c1
  • question-first witness SHA-256: c9571f97a37d503ad6a61034cc00108543a05c37ef246d1c4962f55136a3de02
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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