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Question 7673: Three 1-Based Matrix Queries with Eligibility Guards

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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R0014-07673 · q-20261012-advance-20261016-r02-matrix-0073

Original question and givens

Use complete nonempty integer matrices with 1–5 rows and columns and 1-based external indices. Transposition is not inversion or reversal of element order. M=[[10, 9, 8], [11, 10, 9], [12, 11, 10], [13, 12, 11], [14, 13, 12]], ordered (i,j) candidates=[[1, 1], [5, 3], [0, 1]]. Give (shape of M, three index-eligibility values, three entries or invalid-index). Do not read an invalid entry.

  • G001 — Use complete nonempty integer matrices with 1–5 rows and columns and 1-based external indices. Transposition is not inversion or reversal of element order. M=[[10, 9, 8], [11, 10, 9], [12, 11, 10], [13, 12, 11], [14, 13, 12]], ordered (i,j) candidates=[[1, 1], [5, 3], [0, 1]]. Give (shape of M, three index-eligibility values, three entries or invalid-index). Do not read an invalid entry.

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

M=[[10, 9, 8], [11, 10, 9], [12, 11, 10], [13, 12, 11], [14, 13, 12]];shape=[5, 3]

After

external indices start at1;transpose is not inverse

Conditions: none

First confirm a nonempty rectangular shape and complete integer entries.Transposition is defined for rectangular matrices without invertibility and is not matrix inversion.

Step identifiers and dependencies

Rule: rectangular_matrix_scope · Uses: G001

S002 · implies

Before

query0=(1,1);shape=[5, 3]

After

qualified=Yes;value/status=10

Conditions: none

Both external indices must lie from1 through the corresponding size before reading the internal(i−1,j−1) position.Do not fill an invalid query using negative or wrapping indices.

Step identifiers and dependencies

Rule: matrix_index_eligibility_before_read · Uses: G001, S001

S003 · implies

Before

query1=(5,3);shape=[5, 3]

After

qualified=Yes;value/status=12

Conditions: none

Both external indices must lie from1 through the corresponding size before reading the internal(i−1,j−1) position.Do not fill an invalid query using negative or wrapping indices.

Step identifiers and dependencies

Rule: matrix_index_eligibility_before_read · Uses: G001, S002

S004 · implies

Before

query2=(0,1);shape=[5, 3]

After

qualified=No;value/status=invalid index

Conditions: none

Both external indices must lie from1 through the corresponding size before reading the internal(i−1,j−1) position.Do not fill an invalid query using negative or wrapping indices.

Step identifiers and dependencies

Rule: matrix_index_eligibility_before_read · Uses: G001, S003

Reverse checks

  • S004 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S003 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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

([5, 3], [Yes, Yes, No], [10, 12, invalid-index])

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: c90e2705cdec6dc2a0b90cd293009557bd1ef4f2a10e1f98dfec84dc23d7c0f4
  • candidate record SHA-256: 963ad27d077add95c4c49f09afa56affbe1559330ae76a7100f77d53cdc6174f
  • semantic review receipt SHA-256: 23ba8196e85a09c03add0a87f96bec5d67a00dc648d1d68eef89101525b41a77
  • question-first witness SHA-256: 17d59afc327b7cb8b6e588686d6dc1abbccd384d8ba32b8c046652f96821d705
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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