Question 24446: Evaluate Every Coordinate Derivative at the Same Exact Rational Point

Original question and givens

Use dimension=2, raw polynomial terms=[[21, [2, 1]], [22, [0, 1]], [1, [0, 0]]], each [rational coefficient,ordered exponent vector]. Coefficients may be integers or [numerator,denominator]. Exponent/point arities equal the dimension. Combine equal monomials and remove zero coefficients before the canonical symbolic output. Coordinate order and the standard Euclidean basis/metric are fixed. Point=[21/1, 22/2]. Give (dimension, canonical_terms, point, coordinate_derivative_polynomials, gradient_values, certificate).

• G001 — Use dimension=2, raw polynomial terms=[[21, [2, 1]], [22, [0, 1]], [1, [0, 0]]], each [rational coefficient,ordered exponent vector]. Coefficients may be integers or [numerator,denominator]. Exponent/point arities equal the dimension. Combine equal monomials and remove zero coefficients before the canonical symbolic output. Coordinate order and the standard Euclidean basis/metric are fixed. Point=[21/1, 22/2]. Give (dimension, canonical_terms, point, coordinate_derivative_polynomials, gradient_values, certificate).

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-gradient-vector

Step-by-step derivation

source roles = [gradient-rational-point]

derived = [[dimension, canonical_terms, point, coordinate_derivative_polynomials, gradient_values, certificate]]

Gradient ORIGINAL monomial coefficient sum0 := sum(0, 21)

Gradient ORIGINAL monomial coefficient sum0 = 21

source roles = [0, 2, [2, 1], 21]

derived = [21]

Gradient ORIGINAL monomial coefficient sum1 := sum(0, 22)

Gradient ORIGINAL monomial coefficient sum1 = 22

source roles = [1, 2, [0, 1], 22]

derived = [22]

Gradient ORIGINAL monomial coefficient sum2 := sum(0, 1)

Gradient ORIGINAL monomial coefficient sum2 = 1

source roles = [2, 2, [0, 0], 1]

derived = [1]

source roles = [[[21, [2, 1]], [22, [0, 1]], [1, [0, 0]]]]

derived = [2, [[1, [0, 0]], [22, [0, 1]], [21, [2, 1]]]]

source roles = [0, 0, [0, 0], 1]

derived = [0]

source roles = [0, 1, [0, 1], 22]

derived = [0]

Gradient axis0 term2 power-rule coefficient := mul(21, 2)

Gradient axis0 term2 power-rule coefficient = 42

Gradient axis0 derivative combine2 := sum(0, 42)

Gradient axis0 derivative combine2 = 42

source roles = [0, 2, [2, 1], 21, 2]

derived = [[1, 1], 42]

source roles = [1, 0, [0, 0], 1]

derived = [0]

Gradient axis1 term1 power-rule coefficient := mul(22, 1)

Gradient axis1 term1 power-rule coefficient = 22

Gradient axis1 derivative combine1 := sum(0, 22)

Gradient axis1 derivative combine1 = 22

source roles = [1, 1, [0, 1], 22, 1]

derived = [[0, 0], 22]

Gradient axis1 term2 power-rule coefficient := mul(21, 1)

Gradient axis1 term2 power-rule coefficient = 21

Gradient axis1 derivative combine2 := sum(0, 21)

Gradient axis1 derivative combine2 = 21

source roles = [1, 2, [2, 1], 21, 1]

derived = [[2, 0], 21]

source roles = [2, [[1, [0, 0]], [22, [0, 1]], [21, [2, 1]]]]

derived = [[[[42, [1, 1]]], [[22, [0, 0]], [21, [2, 0]]]]]

(21)^1

Gradient axis0 term0 coordinate0 power = 21

Gradient axis0 term0 coordinate0 factor := mul(42, 21)

Gradient axis0 term0 coordinate0 factor = 882

(11)^1

Gradient axis0 term0 coordinate1 power = 11

Gradient axis0 term0 coordinate1 factor := mul(882, 11)

Gradient axis0 term0 coordinate1 factor = 9702

Gradient axis0 cumulative term0 := sum(0, 9702)

Gradient axis0 cumulative term0 = 9702

(21)^0

Gradient axis1 term0 coordinate0 power = 1

Gradient axis1 term0 coordinate0 factor := mul(22, 1)

Gradient axis1 term0 coordinate0 factor = 22

(11)^0

Gradient axis1 term0 coordinate1 power = 1

Gradient axis1 term0 coordinate1 factor := mul(22, 1)

Gradient axis1 term0 coordinate1 factor = 22

(21)^2

Gradient axis1 term1 coordinate0 power = 441

Gradient axis1 term1 coordinate0 factor := mul(21, 441)

Gradient axis1 term1 coordinate0 factor = 9261

(11)^0

Gradient axis1 term1 coordinate1 power = 1

Gradient axis1 term1 coordinate1 factor := mul(9261, 1)

Gradient axis1 term1 coordinate1 factor = 9261

Gradient axis1 cumulative term0 := sum(0, 22)

Gradient axis1 cumulative term0 = 22

Gradient axis1 cumulative term1 := sum(22, 9261)

Gradient axis1 cumulative term1 = 9283

source roles = [2, [21, 11], [[[42, [1, 1]]], [[22, [0, 0]], [21, [2, 0]]]]]

derived = [[9702, 9283], No, No]

Reverse checks

• S037 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S036 · premise_and_result_audit — Recompute Gradient axis1 cumulative term1 with exact rational arithmetic, not rounded decimals.
• S035 · premise_and_result_audit — Recompute Gradient axis1 cumulative term0 with exact rational arithmetic, not rounded decimals.
• S034 · premise_and_result_audit — Recompute Gradient axis1 term1 coordinate1 factor with exact rational arithmetic, not rounded decimals.
• S033 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S032 · premise_and_result_audit — Recompute Gradient axis1 term1 coordinate0 factor with exact rational arithmetic, not rounded decimals.
• S031 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S030 · premise_and_result_audit — Recompute Gradient axis1 term0 coordinate1 factor with exact rational arithmetic, not rounded decimals.
• S029 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S028 · premise_and_result_audit — Recompute Gradient axis1 term0 coordinate0 factor with exact rational arithmetic, not rounded decimals.
• S027 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S026 · premise_and_result_audit — Recompute Gradient axis0 cumulative term0 with exact rational arithmetic, not rounded decimals.
• S025 · premise_and_result_audit — Recompute Gradient axis0 term0 coordinate1 factor with exact rational arithmetic, not rounded decimals.
• S024 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S023 · premise_and_result_audit — Recompute Gradient axis0 term0 coordinate0 factor with exact rational arithmetic, not rounded decimals.
• 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S020 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S019 · premise_and_result_audit — Recompute Gradient axis1 derivative combine2 with exact rational arithmetic, not rounded decimals.
• S018 · premise_and_result_audit — Recompute Gradient axis1 term2 power-rule coefficient 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 Gradient axis1 derivative combine1 with exact rational arithmetic, not rounded decimals.
• S015 · premise_and_result_audit — Recompute Gradient axis1 term1 power-rule coefficient with exact rational arithmetic, not rounded decimals.
• S014 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• 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 Gradient axis0 derivative combine2 with exact rational arithmetic, not rounded decimals.
• S011 · premise_and_result_audit — Recompute Gradient axis0 term2 power-rule coefficient with exact rational arithmetic, not rounded decimals.
• S010 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S009 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S006 · premise_and_result_audit — Recompute Gradient ORIGINAL monomial coefficient sum2 with exact rational arithmetic, not rounded decimals.
• S005 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S004 · premise_and_result_audit — Recompute Gradient ORIGINAL monomial coefficient sum1 with exact rational arithmetic, not rounded decimals.
• 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 — Recompute Gradient ORIGINAL monomial coefficient sum0 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

(2, [[1, [0, 0]], [22, [0, 1]], [21, [2, 1]]], [21, 11], [[[42, [1, 1]]], [[22, [0, 0]], [21, [2, 0]]]], [9702, 9283], exact_rational_coordinate_evaluation)

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.