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Question 15872: Keep Enumeration Direction and Original List Order Explicit

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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R0030-15872 · q-20261014-advance-20261031-r01-at-most-countable-set-0072

Original question and givens

Complete nonempty duplicate-free finite integer enumeration elements=[21, 71, -22], zero-based index=0. Give (index,element,enumeration_pairs,finite_enumeration_complete). Enumeration pairs are [position,element], not the reversed injection pairs.

  • G001 — Complete nonempty duplicate-free finite integer enumeration elements=[21, 71, -22], zero-based index=0. Give (index,element,enumeration_pairs,finite_enumeration_complete). Enumeration pairs are [position,element], not the reversed injection pairs.

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 complete finite integer set in original list order=[21, 71, -22];length=3

After

nonempty duplicate-free registered family;original order retained;empty-set countability not denied

Conditions: none

Completeness is the declared set premise,not inferred for an unknown universe from samples.Keep order and reject duplicates rather than sorting or deduplicating.The family's empty-list rejection is an interface limit,not denial of empty-set countability.

Step identifiers and dependencies

Rule: countable_complete_finite_list_premise_not_sampled_subset · Uses: G001

S002 · implies

Before

complete original ordered enumeration=[21, 71, -22];selected zero-based index=0

After

selected element=21;position_to_element pairs=[[0, 21], [1, 71], [2, -22]]

Conditions: none

Read the original position and list every position-to-element pair.This finite enumeration supplies a finite and thus at-most-countable certificate,not countable infinitude.

Step identifiers and dependencies

Rule: finite_countable_enumeration_order_not_injection_reversal · 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

(0, 21, [[0, 21], [1, 71], [2, -22]], finite_enumeration_complete)

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: a2f5b89b1b7ce0530ba0e0a59622b0d93cdcc330e03ecca3d59665258cfb846f
  • candidate record SHA-256: 327e8c67f2683e27c53501aaadb82e760e7ac1801abf3addca556c49d3f0ff46
  • semantic review receipt SHA-256: 73bc08066ffb1a81eacb2d4e288d03f522aeefd3949fa0d97da41b484ed737bc
  • question-first witness SHA-256: ac120452a208b257b8270f38351a09dcd832cdbc8d9db6b69933f83e43cc9336
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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