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Question 15054: Eventual Equality Supplies a Conditional Universal-Tail Certificate

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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R0029-15054 · q-20261014-advance-20261030-r07-convergence-in-probability-0079

Original question and givens

On the declared common probability space assume X_n=X almost surely for every n≥settling_index=4; inspect n=4. Give (settling_index,n,zero_probability_status,certificate?,eventual_equality_universal_tail_certificate).

  • G001 — On the declared common probability space assume X_n=X almost surely for every n≥settling_index=4; inspect n=4. Give (settling_index,n,zero_probability_status,certificate?,eventual_equality_universal_tail_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

declared common probability space;X_k=X almost surely for EVERY k>=4;inspected n=4

After

inspected deviation status=0;for EVERY positive epsilon,all k>=4 have deviation probability0

Conditions: none

Use the explicitly declared all-later almost-sure equality,not a pattern guessed from this index.Earlier not_yet_zero only means the certificate has not supplied0,not a known positive probability.The all-epsilon zero tail gives the conditional convergence-in-probability certificate.

Step identifiers and dependencies

Rule: eventual_equality_full_tail_not_one_index · Uses: G001

Reverse checks

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

Result

(4, 4, 0, Yes, eventual_equality_universal_tail_certificate)

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: 9700366a38e1fb0f7433d1a57f481be0f7090cc928e4f07366c1c2937149b155
  • candidate record SHA-256: 9f2b1579dd6d26e4b141f258e1e4f4a6710f4bdbcb3361e9a86441d5c67769db
  • semantic review receipt SHA-256: 8c0ef6ca8c5ba2754e41f30c2b32bcb757756152d97421f7396d39038c11f725
  • question-first witness SHA-256: c7920a0ff8e724b7e566ebbda30b31d8087c136974b62f8c760fbd26ab816117
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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