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Question 10051: Complete Coefficients of a Factor Product

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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R0019-10051 · q-20261003-r03-factorization-0001

Original question and givens

In Q[x], coefficient vectors are ordered from lowest to highest power. Multiply the factors [0] and [7, 1] and return the normalized complete coefficient vector.

  • G001 — In Q[x], coefficient vectors are ordered from lowest to highest power. Multiply the factors [0] and [7, 1] and return the normalized complete coefficient vector.

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

Q[x];ascending coefficients;input vectors may have trailing zeros

After

equality uses every normalized coefficient,not numerical sampling

Conditions: none

Preserve the original factor order and vectors.Normalization removes only trailing high-power zeros;do not reorder source factors by semantic identity or infer polynomial equality from one point.

Step identifiers and dependencies

Rule: factorization_coefficient_identity_scope · Uses: G001

S002 · implies

Before

raw left=[0];raw right=[7, 1]

After

normalized left=[];normalized right=[7, 1]

Conditions: none

Remove trailing zeros only,not internal zeros or the original vector order.Empty and all-zero vectors both represent zero.

Step identifiers and dependencies

Rule: factor_vectors_trailing_zero_normalization · Uses: G001, S001

S003 · implies

Before

normalized factors=[[], [7, 1]]

After

zero factor gives normalized product=[0]

Conditions: none

An empty normalized vector represents the zero polynomial.A zero factor makes the entire product zero without a fabricated leading degree.

Step identifiers and dependencies

Rule: zero_polynomial_product · Uses: G001, S002

Reverse checks

  • 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

[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: 7b4aee1f83af03eec273b0755c872a37ffe6ed1d493c0e75480a1855b9ce9cf4
  • candidate record SHA-256: 200dd64d47116a374781020f0d6166fd08a2b077e81d7b14adfd3d2460cdbfdf
  • semantic review receipt SHA-256: eeb35dc5daab92234bf72827627392b47f38ead4cfb574d4373bebc43c09fbf5
  • question-first witness SHA-256: 3cf8e0d3a00b0df1994db2bfde81f4a31b382e170bdda83ea3d0b68da64e8419
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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