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Question 7916: Weighted Vector Candidate and Ordered Residual

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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R0014-07916 · q-20261012-advance-20261016-r01-vector-0091

Original question and givens

Use ordered integer two-component vectors in one fixed standard basis; zero scalars and zero vectors are allowed. Component arithmetic is not an inner product or length. u=[3, 1], v=[1, 2], a=2, b=1, candidate=[7, 4]. Give (au+bv, candidate−actual value, is the candidate equal?).

  • G001 — Use ordered integer two-component vectors in one fixed standard basis; zero scalars and zero vectors are allowed. Component arithmetic is not an inner product or length. u=[3, 1], v=[1, 2], a=2, b=1, candidate=[7, 4]. Give (au+bv, candidate−actual value, is the candidate equal?).

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

fixed standard basis;two ordered integer coordinates

After

componentwise operations;not length or inner product

Conditions: none

Work coordinate by coordinate in the same fixed basis.Swapping coordinates,taking a norm or computing an inner product is not the requested vector answer.

Step identifiers and dependencies

Rule: ordered_vector_scope · Uses: G001

S002 · calculation

Before

au[0] := mul(2, 3)

After

au[0] = 6

Conditions: none

Multiply the specified scalar and component at this position;do not substitute an inner product or entrywise matrix product.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S001

S003 · calculation

Before

au[1] := mul(2, 1)

After

au[1] = 2

Conditions: none

Multiply the specified scalar and component at this position;do not substitute an inner product or entrywise matrix product.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S002

S004 · calculation

Before

bv[0] := mul(1, 1)

After

bv[0] = 1

Conditions: none

Multiply the specified scalar and component at this position;do not substitute an inner product or entrywise matrix product.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S003

S005 · calculation

Before

bv[1] := mul(1, 2)

After

bv[1] = 2

Conditions: none

Multiply the specified scalar and component at this position;do not substitute an inner product or entrywise matrix product.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S004

S006 · calculation

Before

au+bv[0] := sum(6, 1)

After

au+bv[0] = 7

Conditions: none

Add the already aligned component or position,without mixing coordinates.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S005

S007 · calculation

Before

au+bv[1] := sum(2, 2)

After

au+bv[1] = 4

Conditions: none

Add the already aligned component or position,without mixing coordinates.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S006

S008 · implies

Before

au=[6, 2];bv=[1, 2]

After

value=[7, 4]

Conditions: none

Each weight multiplies its own vector before aligned coordinates are added.Negative weights and the zero vector use the same definition.

Step identifiers and dependencies

Rule: weighted_vector_components · Uses: G001, S007

S009 · calculation

Before

candidate-value[0] := sub(7, 7)

After

candidate-value[0] = 0

Conditions: none

Subtract the second operand from the first in the requested order,retaining the residual sign.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S008

S010 · calculation

Before

candidate-value[1] := sub(4, 4)

After

candidate-value[1] = 0

Conditions: none

Subtract the second operand from the first in the requested order,retaining the residual sign.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S009

S011 · implies

Before

candidate=[7, 4];residual=[0, 0]

After

equal=Yes

Conditions: none

Both components of candidate minus true value must be zero.One matching coordinate does not establish equality of the entire vector.

Step identifiers and dependencies

Rule: vector_candidate_all_coordinates · Uses: G001, S010

Reverse checks

  • S011 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S010 · premise_and_result_audit — Recompute candidate-value[1] with exact rational arithmetic, not rounded decimals.
  • S009 · premise_and_result_audit — Recompute candidate-value[0] with exact rational arithmetic, not rounded decimals.
  • S008 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S007 · premise_and_result_audit — Recompute au+bv[1] with exact rational arithmetic, not rounded decimals.
  • S006 · premise_and_result_audit — Recompute au+bv[0] with exact rational arithmetic, not rounded decimals.
  • S005 · premise_and_result_audit — Recompute bv[1] with exact rational arithmetic, not rounded decimals.
  • S004 · premise_and_result_audit — Recompute bv[0] with exact rational arithmetic, not rounded decimals.
  • S003 · premise_and_result_audit — Recompute au[1] with exact rational arithmetic, not rounded decimals.
  • S002 · premise_and_result_audit — Recompute au[0] with exact rational arithmetic, not rounded decimals.
  • S001 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.

Result

([7, 4], [0, 0], Yes)

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: 5ac518c2e76470eb5df45bad6cebc78be2cfb952350092fd51b8cc9e55a504c6
  • candidate record SHA-256: edc46a2b63ccd823f7be29f3e31a47aa9a2d9a2fa8e2d6a31a806854a874f177
  • semantic review receipt SHA-256: 23ba8196e85a09c03add0a87f96bec5d67a00dc648d1d68eef89101525b41a77
  • question-first witness SHA-256: 17d59afc327b7cb8b6e588686d6dc1abbccd384d8ba32b8c046652f96821d705
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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