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Question 10699: A Fixed-Second-Coordinate Slice on Listed Inputs Only

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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← Question derivation index · Original question batch

R0020-10699 · q-20261013-advance-20261023-r07-multivariable-real-function-0074

Original question and givens

Use the declared real polynomial R²→R with coefficients=[11, 1, -1, 1, 1, -1] in the fixed order [1,x,y,x²,x*y,y²]. Keep the two coordinate roles distinct. These explicit slices establish no global continuity, differentiability or vector-valued-function claim. fixed y=1, x input list=[-1, 0, -1] normalized to sorted distinct integers. Give (coefficients,fixed y,normalized inputs,every [x,f(x,y)] row). Empty input lists are allowed.

  • G001 — Use the declared real polynomial R²→R with coefficients=[11, 1, -1, 1, 1, -1] in the fixed order [1,x,y,x²,x*y,y²]. Keep the two coordinate roles distinct. These explicit slices establish no global continuity, differentiability or vector-valued-function claim. fixed y=1, x input list=[-1, 0, -1] normalized to sorted distinct integers. Give (coefficients,fixed y,normalized inputs,every [x,f(x,y)] row). Empty input lists are allowed.

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

original six coefficients=[11, 1, -1, 1, 1, -1]

After

declared scalar R2->R polynomial;finite audits keep coordinate/value roles

Conditions: none

Evaluate the declared formula exactly.A finite point match is not a new general formal proof of global equivalence,continuity or differentiability.

Step identifiers and dependencies

Rule: bivariate_explicit_slice_scope · Uses: G001

S002 · implies

Before

fixed second coordinate y=1;raw first-coordinate list=[-1, 0, -1]

After

sorted distinct first coordinates=[-1, 0]

Conditions: none

Fix y and normalize only the supplied x list.Do not invent points for an empty list or claim a finite slice determines the whole function.

Step identifiers and dependencies

Rule: slice_fixed_second_coordinate_not_global_curve · Uses: G001, S001

S003 · calculation

Before

slice x-1 x squared := mul(-1, -1)

After

slice x-1 x squared = 1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S002

S004 · calculation

Before

slice x-1 x times y := mul(-1, 1)

After

slice x-1 x times y = -1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S003

S005 · calculation

Before

slice x-1 y squared := mul(1, 1)

After

slice x-1 y squared = 1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S004

S006 · implies

Before

slice x-1:x=-1;y=1;coefficients=[11, 1, -1, 1, 1, -1]

After

fixed monomial values [1,x,y,x^2,xy,y^2]=[1, -1, 1, 1, -1, 1]

Conditions: none

The six coefficients correspond to[1,x,y,x²,xy,y²] in that order.Do not exchange x and y or reinterpret the scalar function as vector-valued.

Step identifiers and dependencies

Rule: bivariate_fixed_coordinate_monomial_roles · Uses: G001, S005

S007 · calculation

Before

slice x-1 monomial term0 := mul(11, 1)

After

slice x-1 monomial term0 = 11

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S006

S008 · calculation

Before

slice x-1 monomial term1 := mul(1, -1)

After

slice x-1 monomial term1 = -1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S007

S009 · calculation

Before

slice x-1 monomial term2 := mul(-1, 1)

After

slice x-1 monomial term2 = -1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S008

S010 · calculation

Before

slice x-1 monomial term3 := mul(1, 1)

After

slice x-1 monomial term3 = 1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S009

S011 · calculation

Before

slice x-1 monomial term4 := mul(1, -1)

After

slice x-1 monomial term4 = -1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S010

S012 · calculation

Before

slice x-1 monomial term5 := mul(-1, 1)

After

slice x-1 monomial term5 = -1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S011

S013 · calculation

Before

slice x-1 complete polynomial sum := sum(11, -1, -1, 1, -1, -1)

After

slice x-1 complete polynomial sum = 8

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S012

S014 · calculation

Before

slice x0 x squared := mul(0, 0)

After

slice x0 x squared = 0

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S013

S015 · calculation

Before

slice x0 x times y := mul(0, 1)

After

slice x0 x times y = 0

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S014

S016 · calculation

Before

slice x0 y squared := mul(1, 1)

After

slice x0 y squared = 1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S015

S017 · implies

Before

slice x0:x=0;y=1;coefficients=[11, 1, -1, 1, 1, -1]

After

fixed monomial values [1,x,y,x^2,xy,y^2]=[1, 0, 1, 0, 0, 1]

Conditions: none

The six coefficients correspond to[1,x,y,x²,xy,y²] in that order.Do not exchange x and y or reinterpret the scalar function as vector-valued.

Step identifiers and dependencies

Rule: bivariate_fixed_coordinate_monomial_roles · Uses: G001, S016

S018 · calculation

Before

slice x0 monomial term0 := mul(11, 1)

After

slice x0 monomial term0 = 11

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S017

S019 · calculation

Before

slice x0 monomial term1 := mul(1, 0)

After

slice x0 monomial term1 = 0

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S018

S020 · calculation

Before

slice x0 monomial term2 := mul(-1, 1)

After

slice x0 monomial term2 = -1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S019

S021 · calculation

Before

slice x0 monomial term3 := mul(1, 0)

After

slice x0 monomial term3 = 0

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S020

S022 · calculation

Before

slice x0 monomial term4 := mul(1, 0)

After

slice x0 monomial term4 = 0

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S021

S023 · calculation

Before

slice x0 monomial term5 := mul(-1, 1)

After

slice x0 monomial term5 = -1

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S022

S024 · calculation

Before

slice x0 complete polynomial sum := sum(11, 0, -1, 0, 0, -1)

After

slice x0 complete polynomial sum = 9

Conditions: none

Compute exactly with this step's original roles and operands,without floating approximation or reordering source data.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S023

Reverse checks

  • S024 · premise_and_result_audit — Recompute slice x0 complete polynomial sum with exact rational arithmetic, not rounded decimals.
  • S023 · premise_and_result_audit — Recompute slice x0 monomial term5 with exact rational arithmetic, not rounded decimals.
  • S022 · premise_and_result_audit — Recompute slice x0 monomial term4 with exact rational arithmetic, not rounded decimals.
  • S021 · premise_and_result_audit — Recompute slice x0 monomial term3 with exact rational arithmetic, not rounded decimals.
  • S020 · premise_and_result_audit — Recompute slice x0 monomial term2 with exact rational arithmetic, not rounded decimals.
  • S019 · premise_and_result_audit — Recompute slice x0 monomial term1 with exact rational arithmetic, not rounded decimals.
  • S018 · premise_and_result_audit — Recompute slice x0 monomial term0 with exact rational arithmetic, not rounded decimals.
  • S017 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S016 · premise_and_result_audit — Recompute slice x0 y squared with exact rational arithmetic, not rounded decimals.
  • S015 · premise_and_result_audit — Recompute slice x0 x times y with exact rational arithmetic, not rounded decimals.
  • S014 · premise_and_result_audit — Recompute slice x0 x squared with exact rational arithmetic, not rounded decimals.
  • S013 · premise_and_result_audit — Recompute slice x-1 complete polynomial sum with exact rational arithmetic, not rounded decimals.
  • S012 · premise_and_result_audit — Recompute slice x-1 monomial term5 with exact rational arithmetic, not rounded decimals.
  • S011 · premise_and_result_audit — Recompute slice x-1 monomial term4 with exact rational arithmetic, not rounded decimals.
  • S010 · premise_and_result_audit — Recompute slice x-1 monomial term3 with exact rational arithmetic, not rounded decimals.
  • S009 · premise_and_result_audit — Recompute slice x-1 monomial term2 with exact rational arithmetic, not rounded decimals.
  • S008 · premise_and_result_audit — Recompute slice x-1 monomial term1 with exact rational arithmetic, not rounded decimals.
  • S007 · premise_and_result_audit — Recompute slice x-1 monomial term0 with exact rational arithmetic, not rounded decimals.
  • S006 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S005 · premise_and_result_audit — Recompute slice x-1 y squared with exact rational arithmetic, not rounded decimals.
  • S004 · premise_and_result_audit — Recompute slice x-1 x times y with exact rational arithmetic, not rounded decimals.
  • S003 · premise_and_result_audit — Recompute slice x-1 x squared with exact rational arithmetic, not rounded decimals.
  • 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

([11, 1, -1, 1, 1, -1], 1, [-1, 0], [[-1, 8], [0, 9]])

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: 971d7a0ee729ee81a5e896cffe5fa3bef249500aec0bdded3efd19aa893ce696
  • candidate record SHA-256: c44b39343db3b8543380f107444476ee5c8aad7e3e9eb9889ee0764967a77b48
  • semantic review receipt SHA-256: b4c47938fd38085d44967226cfa8337d61334455472e7307c60d3a488cef598f
  • question-first witness SHA-256: 3c23baa97a5933bc07b44f2257017ef4e845bf1429bd6f5381410681c43b97e4
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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