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Question 31003: Converse Relation before Inverse-Function Qualification

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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R0061-31003 · q-20261012-advance-20261017-r01-bijective-0028

Original question and givens

Use the complete total map Fin(1)={0,…,0}→Fin(1) with images=[0] in source-index order. Validate every image in the declared codomain first. Equal finite cardinalities do not make the given map bijective. Give (sorted swapped relation pairs [f(x),x], each codomain fiber size, inverse-function eligibility, inverse table or not-an-inverse-function).

  • G001 — Use the complete total map Fin(1)={0,…,0}→Fin(1) with images=[0] in source-index order. Validate every image in the declared codomain first. Equal finite cardinalities do not make the given map bijective. Give (sorted swapped relation pairs [f(x),x], each codomain fiber size, inverse-function eligibility, inverse table or not-an-inverse-function).

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 roles = [qf-density17-bij-swapped-relation-audit, bij-swapped-relation-audit, domain, Fin_total_table]

After

derived = [[swapped_pairs, fiber_sizes, bijective, inverse_or_tag]]

Conditions: none

Check THIS source interface:distance uses ONLY its complete coordinate frame;other families use a domain.Discrete operations use local hyphens,legacy banks underscores.Retain family-specific ordered output types and original bilingual data/status.

Step identifiers and dependencies

Rule: R61_SOURCE_exact_keys_operation_domain_OR_frame_and_output_roles · Uses: G001

S002 · implies

Before

source roles = [1, 1, [0]]

After

derived = [[(0, 0)]]

Conditions: none

EVERY source image must lie in Fin(m),and the complete table has length n.A nonbijective total table is a legal input;do not assume an inverse function exists.

Step identifiers and dependencies

Rule: Swap_COMPLETE_total_table_typed_before_inverse_guard · Uses: G001, S001

S003 · implies

Before

source roles = [0, [0]]

After

derived = [[0], 1]

Conditions: none

List ALL preimages for EACH original codomain label,including empty fibers.Keep original source indices without assuming singleton fibers.

Step identifiers and dependencies

Rule: Swap_EACH_target_ALL_original_preimages_including_empty · Uses: G001, S002

S004 · implies

Before

source roles = [1, 1, [0], [[0]]]

After

derived = [[[0, 0]], [1], Yes, [0]]

Conditions: none

Swap EVERY ordered pair and sort by numeric(target,source)lexicographic order.ONLY singleton preimages at every target permit an inverse function.Empty-to-empty has an empty inverse;otherwise retain the tag without inventing0.

Step identifiers and dependencies

Rule: Swap_RELATION_global_numeric_LEX_bijection_guard_THEN_inverse · Uses: G001, S003

Reverse checks

  • S004 · premise_and_result_audit — Reverse-check the ORIGINAL inputs,types and premises;the conclusion need not uniquely recover its premises.This source-bound candidate is not independent review or formal proof.
  • S003 · premise_and_result_audit — Reverse-check the ORIGINAL inputs,types and premises;the conclusion need not uniquely recover its premises.This source-bound candidate is not independent review or formal proof.
  • S002 · premise_and_result_audit — Reverse-check the ORIGINAL inputs,types and premises;the conclusion need not uniquely recover its premises.This source-bound candidate is not independent review or formal proof.
  • S001 · premise_and_result_audit — Reverse-check the ORIGINAL inputs,types and premises;the conclusion need not uniquely recover its premises.This source-bound candidate is not independent review or formal proof.

Result

([[0, 0]], [1], Yes, [0])

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: 218552c2f02add497b081fcae6272ae5d64abe988fcca7eef57b9f9086154fb2
  • candidate record SHA-256: e551b3ea2eb97e752050f9a262a54d04ce029ec14a0c70741d85ce051320a359
  • semantic review receipt SHA-256: 5403317467ff7c6b74c18ae7211530d0156ebc67d63fc00a3e07b81a201d3d69
  • question-first witness SHA-256: c2b5022aa77f803cd3e1ba9ce162a707da0281aa5bb5289111a97de51fe8c495
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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