Question 11231: Unique Coordinates Only after Qualifying an Ordered Plane Basis

Original question and givens

Use the explicitly supplied finite integer-coordinate vector family in a real coordinate space. Preserve vector order and coefficient pairing. Rank is computed by exact rational elimination; a basis requires both independence and spanning the declared space, not just one condition. ordered basis=[[1, -2], [0, 1]], target=[-7, 2]. Require exactly two independent R² vectors, used as columns. Give (basis,target,signed determinant,first coefficient,second coefficient,reconstructed target). Use exact rational arithmetic, reduce fractions to positive denominators and omit /1 for integer outputs.

• G001 — Use the explicitly supplied finite integer-coordinate vector family in a real coordinate space. Preserve vector order and coefficient pairing. Rank is computed by exact rational elimination; a basis requires both independence and spanning the declared space, not just one condition. ordered basis=[[1, -2], [0, 1]], target=[-7, 2]. Require exactly two independent R² vectors, used as columns. Give (basis,target,signed determinant,first coefficient,second coefficient,reconstructed target). Use exact rational arithmetic, reduce fractions to positive denominators and omit /1 for integer outputs.

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.

• mko-linear-independence-basis

Step-by-step derivation

basis determinant first product := mul(1, 1)

basis determinant first product = 1

basis determinant second product := mul(0, -2)

basis determinant second product = 0

basis determinant signed difference := sub(1, 0)

basis determinant signed difference = 1

ordered basis columns=[[1, -2], [0, 1]];target=[-7, 2];signed determinant=1

nonzero determinant;unique real coordinates;Cramer division permitted

first coordinate numerator first product := mul(-7, 1)

first coordinate numerator first product = -7

first coordinate numerator second product := mul(0, 2)

first coordinate numerator second product = 0

first coordinate numerator signed difference := sub(-7, 0)

first coordinate numerator signed difference = -7

second coordinate numerator first product := mul(1, 2)

second coordinate numerator first product = 2

second coordinate numerator second product := mul(-7, -2)

second coordinate numerator second product = 14

second coordinate numerator signed difference := sub(2, 14)

second coordinate numerator signed difference = -12

first basis coordinate := div(-7, 1)

first basis coordinate = -7

second basis coordinate := div(-12, 1)

second basis coordinate = -12

coordinate reconstruction:ordered vectors=[[1, -2], [0, 1]];aligned weights=[-7, -12]

dimension=2;preserve duplicates and order

coordinate reconstruction coordinate0 term0 := mul(-7, 1)

coordinate reconstruction coordinate0 term0 = -7

coordinate reconstruction coordinate0 term1 := mul(-12, 0)

coordinate reconstruction coordinate0 term1 = 0

coordinate reconstruction coordinate0 sum := sum(-7, 0)

coordinate reconstruction coordinate0 sum = -7

coordinate reconstruction coordinate1 term0 := mul(-7, -2)

coordinate reconstruction coordinate1 term0 = 14

coordinate reconstruction coordinate1 term1 := mul(-12, 1)

coordinate reconstruction coordinate1 term1 = -12

coordinate reconstruction coordinate1 sum := sum(14, -12)

coordinate reconstruction coordinate1 sum = 2

basis target residual0 := sub(-7, -7)

basis target residual0 = 0

basis target residual1 := sub(2, 2)

basis target residual1 = 0

coordinates=[-7, -12];reconstructed=[-7, 2];target=[-7, 2];residuals=[0, 0]

both original equations satisfied;uniqueness follows from qualified basis

Reverse checks

• S022 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S021 · premise_and_result_audit — Recompute basis target residual1 with exact rational arithmetic, not rounded decimals.
• S020 · premise_and_result_audit — Recompute basis target residual0 with exact rational arithmetic, not rounded decimals.
• S019 · premise_and_result_audit — Recompute coordinate reconstruction coordinate1 sum with exact rational arithmetic, not rounded decimals.
• S018 · premise_and_result_audit — Recompute coordinate reconstruction coordinate1 term1 with exact rational arithmetic, not rounded decimals.
• S017 · premise_and_result_audit — Recompute coordinate reconstruction coordinate1 term0 with exact rational arithmetic, not rounded decimals.
• S016 · premise_and_result_audit — Recompute coordinate reconstruction coordinate0 sum with exact rational arithmetic, not rounded decimals.
• S015 · premise_and_result_audit — Recompute coordinate reconstruction coordinate0 term1 with exact rational arithmetic, not rounded decimals.
• S014 · premise_and_result_audit — Recompute coordinate reconstruction coordinate0 term0 with exact rational arithmetic, not rounded decimals.
• S013 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S012 · premise_and_result_audit — Recompute second basis coordinate with exact rational arithmetic, not rounded decimals.
• S011 · premise_and_result_audit — Recompute first basis coordinate with exact rational arithmetic, not rounded decimals.
• S010 · premise_and_result_audit — Recompute second coordinate numerator signed difference with exact rational arithmetic, not rounded decimals.
• S009 · premise_and_result_audit — Recompute second coordinate numerator second product with exact rational arithmetic, not rounded decimals.
• S008 · premise_and_result_audit — Recompute second coordinate numerator first product with exact rational arithmetic, not rounded decimals.
• S007 · premise_and_result_audit — Recompute first coordinate numerator signed difference with exact rational arithmetic, not rounded decimals.
• S006 · premise_and_result_audit — Recompute first coordinate numerator second product with exact rational arithmetic, not rounded decimals.
• S005 · premise_and_result_audit — Recompute first coordinate numerator first product with exact rational arithmetic, not rounded decimals.
• 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 — Recompute basis determinant signed difference with exact rational arithmetic, not rounded decimals.
• S002 · premise_and_result_audit — Recompute basis determinant second product with exact rational arithmetic, not rounded decimals.
• S001 · premise_and_result_audit — Recompute basis determinant first product with exact rational arithmetic, not rounded decimals.

Result

([[1, -2], [0, 1]], [-7, 2], 1, -7, -12, [-7, 2])

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.