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Question 33507: The Entire x-Partial Polynomial in an Explicit Basis

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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R0066-33507 · q-20261013-advance-20261025-r07-partial-derivative-0007

Original question and givens

Use the quadratic candidate coefficients=[-6, -1, 3, 3, -1, -1] in fixed order [1,x,y,x²,x*y,y²]. Fix the other coordinate before taking a one-variable derivative. These symbolic polynomial identities do not replace a limit by one finite-difference sample or establish total differentiability of general functions. Give (original coefficients,x-partial coefficients in basis [1,x,y],[1,x,y]).

  • G001 — Use the quadratic candidate coefficients=[-6, -1, 3, 3, -1, -1] in fixed order [1,x,y,x²,x*y,y²]. Fix the other coordinate before taking a one-variable derivative. These symbolic polynomial identities do not replace a limit by one finite-difference sample or establish total differentiability of general functions. Give (original coefficients,x-partial coefficients in basis [1,x,y],[1,x,y]).

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-mod25-partialdeep-partial-x-polynomial, [coefficients, domain, operation]]

After

derived = [partialdeep-partial-x-polynomial, Polynomial_partial_derivative_density]

Conditions: none

THIS source uses LOCAL-hyphen operations with exact keys/domain.Keep source field order and numeric/Boolean/string roles;integer rational texts omit/1.Original questions,English,MKOs,ASTs and statuses remain unchanged.

Step identifiers and dependencies

Rule: R66_EXACT_source_bank_keys_local_operation_domain · Uses: G001

S002 · implies

Before

source roles = [[-6, -1, 3, 3, -1, -1]]

After

derived = [1, x, y, x^2, x*y, y^2]

Conditions: none

The SIX coefficients use the full[1,x,y,x²,xy,y²]basis.Hold the OTHER coordinate fixed.This supplied polynomial supports symbolic identities,not inference of a derivative from one difference sample or total differentiability of arbitrary functions.

Step identifiers and dependencies

Rule: Partial_FULL_polynomial_basis_and_fixed_other_coordinate · Uses: G001, S001

S003 · implies

Before

source roles = [x, -6, 1]

After

derived = [-6*(0)]

Conditions: none

Apply the constant,power or fixed-other-coordinate product rule to EACH original monomial.Retain zero derivative terms,then collect in[1,x,y].

Step identifiers and dependencies

Rule: Partial_EACH_monomial_power_product_and_constant_rules · Uses: G001, S002

S004 · implies

Before

source roles = [x, -1, x]

After

derived = [-1*(1)]

Conditions: none

Apply the constant,power or fixed-other-coordinate product rule to EACH original monomial.Retain zero derivative terms,then collect in[1,x,y].

Step identifiers and dependencies

Rule: Partial_EACH_monomial_power_product_and_constant_rules · Uses: G001, S003

S005 · implies

Before

source roles = [x, 3, y]

After

derived = [3*(0)]

Conditions: none

Apply the constant,power or fixed-other-coordinate product rule to EACH original monomial.Retain zero derivative terms,then collect in[1,x,y].

Step identifiers and dependencies

Rule: Partial_EACH_monomial_power_product_and_constant_rules · Uses: G001, S004

S006 · implies

Before

source roles = [x, 3, x^2]

After

derived = [3*(2*x)]

Conditions: none

Apply the constant,power or fixed-other-coordinate product rule to EACH original monomial.Retain zero derivative terms,then collect in[1,x,y].

Step identifiers and dependencies

Rule: Partial_EACH_monomial_power_product_and_constant_rules · Uses: G001, S005

S007 · implies

Before

source roles = [x, -1, x*y]

After

derived = [-1*(y)]

Conditions: none

Apply the constant,power or fixed-other-coordinate product rule to EACH original monomial.Retain zero derivative terms,then collect in[1,x,y].

Step identifiers and dependencies

Rule: Partial_EACH_monomial_power_product_and_constant_rules · Uses: G001, S006

S008 · implies

Before

source roles = [x, -1, y^2]

After

derived = [-1*(0)]

Conditions: none

Apply the constant,power or fixed-other-coordinate product rule to EACH original monomial.Retain zero derivative terms,then collect in[1,x,y].

Step identifiers and dependencies

Rule: Partial_EACH_monomial_power_product_and_constant_rules · Uses: G001, S007

S009 · calculation

Before

Partial ORIGINAL twice square coefficient := mul(2, 3)

After

Partial ORIGINAL twice square coefficient = 6

Conditions: none

Calculate exactly from THIS step’s ORIGINAL ordered operands.Retain the SOURCE rational pre-reduction envelope separately;do not use floating values or silently widen a different bank.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S008

S010 · implies

Before

source roles = [x, [-6, -1, 3, 3, -1, -1], [[1, 0], [x, 1], [y, 0], [x^2, 2*x], [x*y, y], [y^2, 0]]]

After

derived = [[-1, 6, -1], [1,x,y]]

Conditions: none

Collect ALL derivative terms in the declared basis without deleting zero coefficients or swapping x/y.Re-expand to audit the derivative contribution of every original term.

Step identifiers and dependencies

Rule: Partial_COLLECT_all_coefficients_in_declared_basis · Uses: G001, S009

Reverse checks

  • S010 · premise_and_result_audit — Reverse-audit THIS step against its ORIGINAL ordered roles and complete premises.Accept the conclusion only under these conditions;do not invert a one-way implication or call a finite check a general formal proof.
  • S009 · premise_and_result_audit — Recompute Partial ORIGINAL twice square coefficient with exact rational arithmetic, not rounded decimals.
  • S008 · premise_and_result_audit — Reverse-audit THIS step against its ORIGINAL ordered roles and complete premises.Accept the conclusion only under these conditions;do not invert a one-way implication or call a finite check a general formal proof.
  • S007 · premise_and_result_audit — Reverse-audit THIS step against its ORIGINAL ordered roles and complete premises.Accept the conclusion only under these conditions;do not invert a one-way implication or call a finite check a general formal proof.
  • S006 · premise_and_result_audit — Reverse-audit THIS step against its ORIGINAL ordered roles and complete premises.Accept the conclusion only under these conditions;do not invert a one-way implication or call a finite check a general formal proof.
  • S005 · premise_and_result_audit — Reverse-audit THIS step against its ORIGINAL ordered roles and complete premises.Accept the conclusion only under these conditions;do not invert a one-way implication or call a finite check a general formal proof.
  • S004 · premise_and_result_audit — Reverse-audit THIS step against its ORIGINAL ordered roles and complete premises.Accept the conclusion only under these conditions;do not invert a one-way implication or call a finite check a general formal proof.
  • S003 · premise_and_result_audit — Reverse-audit THIS step against its ORIGINAL ordered roles and complete premises.Accept the conclusion only under these conditions;do not invert a one-way implication or call a finite check a general formal proof.
  • S002 · premise_and_result_audit — Reverse-audit THIS step against its ORIGINAL ordered roles and complete premises.Accept the conclusion only under these conditions;do not invert a one-way implication or call a finite check a general formal proof.
  • S001 · premise_and_result_audit — Reverse-audit THIS step against its ORIGINAL ordered roles and complete premises.Accept the conclusion only under these conditions;do not invert a one-way implication or call a finite check a general formal proof.

Result

([-6, -1, 3, 3, -1, -1], [-1, 6, -1], [1,x,y])

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: 518639b5f3040a49fdbb1268a1e0eb0a7e7abf7fa9f57e79024fc079d984f16c
  • candidate record SHA-256: 1dfc00a3fe83385b218983abd44f4e8b3c9c0f87c0219ab92865da6f17cead7d
  • semantic review receipt SHA-256: 99b4f114b2ec93164b6aa5681e0107033a240e7a3f0a8988633ba65320ede267
  • question-first witness SHA-256: d9bd3a1940da8a73f790ee3fe460c9a8523791bdbe72c8e0304e3740b66710cc
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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