Question 30445: Axis Antipodes, Squared Separation, and Diameter

Original question and givens

Use a circle boundary, not a disk, in one equal-unit orthogonal Euclidean L2 frame with nonnegative integer radius. For r=0 only the center is on the circle. O=[1, 7], r=19, axis=y. Give (positive-axis endpoint, negative-axis endpoint, squared endpoint separation, diameter). For zero radius the endpoints coincide.

• G001 — Use a circle boundary, not a disk, in one equal-unit orthogonal Euclidean L2 frame with nonnegative integer radius. For r=0 only the center is on the circle. O=[1, 7], r=19, axis=y. Give (positive-axis endpoint, negative-axis endpoint, squared endpoint separation, diameter). For zero radius the endpoints coincide.

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-circle

Step-by-step derivation

source roles = [qf-density14-circle-axis-antipodal-pair, density14_circle_axis_antipodal_pair, finite_integer_circle_boundary_protocol]

derived = [[PLUS_axis_endpoint, MINUS_axis_endpoint, SQUARED_separation, diameter]]

Circle ORIGINAL nonnegative radius squared := mul(19, 19)

Circle ORIGINAL nonnegative radius squared = 361

source roles = [19, orthogonal_equal_unit]

derived = [361]

Circle ORIGINAL positive-axis endpoint := sum(7, 19)

Circle ORIGINAL positive-axis endpoint = 26

Circle ORIGINAL negative-axis endpoint := sub(7, 19)

Circle ORIGINAL negative-axis endpoint = -12

Circle antipodal endpoints ORIGINAL Q minus P coordinate0 := sub(1, 1)

Circle antipodal endpoints ORIGINAL Q minus P coordinate0 = 0

Circle antipodal endpoints ORIGINAL Q minus P coordinate1 := sub(-12, 26)

Circle antipodal endpoints ORIGINAL Q minus P coordinate1 = -38

Circle antipodal endpoints ORIGINAL square coordinate0 := mul(0, 0)

Circle antipodal endpoints ORIGINAL square coordinate0 = 0

Circle antipodal endpoints ORIGINAL square coordinate1 := mul(-38, -38)

Circle antipodal endpoints ORIGINAL square coordinate1 = 1444

Circle antipodal endpoints ORIGINAL squared norm sum := sum(0, 1444)

Circle antipodal endpoints ORIGINAL squared norm sum = 1444

source roles = [Circle antipodal endpoints, [1, 26], [1, -12]]

derived = [[0, -38], 1444]

Circle ORIGINAL diameter twice radius := mul(2, 19)

Circle ORIGINAL diameter twice radius = 38

Circle reverse diameter squared := mul(38, 38)

Circle reverse diameter squared = 1444

source roles = [[1, 7], 19, y]

derived = [[1, 26], [1, -12], 1444, 38]

Reverse checks

• S014 · premise_and_result_audit — Reverse-check this step against the ORIGINAL data,indices and premises,without claiming the conclusion uniquely recovers the inputs.Finite exact checking,independent review,formal proof and publication clearance remain separate.
• S013 · premise_and_result_audit — Recompute Circle reverse diameter squared with exact rational arithmetic, not rounded decimals.
• S012 · premise_and_result_audit — Recompute Circle ORIGINAL diameter twice radius with exact rational arithmetic, not rounded decimals.
• S011 · premise_and_result_audit — Reverse-check this step against the ORIGINAL data,indices and premises,without claiming the conclusion uniquely recovers the inputs.Finite exact checking,independent review,formal proof and publication clearance remain separate.
• S010 · premise_and_result_audit — Recompute Circle antipodal endpoints ORIGINAL squared norm sum with exact rational arithmetic, not rounded decimals.
• S009 · premise_and_result_audit — Recompute Circle antipodal endpoints ORIGINAL square coordinate1 with exact rational arithmetic, not rounded decimals.
• S008 · premise_and_result_audit — Recompute Circle antipodal endpoints ORIGINAL square coordinate0 with exact rational arithmetic, not rounded decimals.
• S007 · premise_and_result_audit — Recompute Circle antipodal endpoints ORIGINAL Q minus P coordinate1 with exact rational arithmetic, not rounded decimals.
• S006 · premise_and_result_audit — Recompute Circle antipodal endpoints ORIGINAL Q minus P coordinate0 with exact rational arithmetic, not rounded decimals.
• S005 · premise_and_result_audit — Recompute Circle ORIGINAL negative-axis endpoint with exact rational arithmetic, not rounded decimals.
• S004 · premise_and_result_audit — Recompute Circle ORIGINAL positive-axis endpoint with exact rational arithmetic, not rounded decimals.
• S003 · premise_and_result_audit — Reverse-check this step against the ORIGINAL data,indices and premises,without claiming the conclusion uniquely recovers the inputs.Finite exact checking,independent review,formal proof and publication clearance remain separate.
• S002 · premise_and_result_audit — Recompute Circle ORIGINAL nonnegative radius squared with exact rational arithmetic, not rounded decimals.
• S001 · premise_and_result_audit — Reverse-check this step against the ORIGINAL data,indices and premises,without claiming the conclusion uniquely recovers the inputs.Finite exact checking,independent review,formal proof and publication clearance remain separate.

Result

([1, 26], [1, -12], 1444, 38)

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.