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Question 27050: One Positive Index Must Give Strict Error Control for Every Point

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

R0053-27050 · q-20261015-advance-20261117-r03-uniform-limit-continuity-theorem-0050

Original question and givens

Use exact E=25>0 and epsilon=5/11>0 for sup error E/(n+1), n≥1. Give (error_scale, epsilon, N, error_at_N, strict_error_bound, certificate).

  • G001 — Use exact E=25>0 and epsilon=5/11>0 for sup error E/(n+1), n≥1. Give (error_scale, epsilon, N, error_at_N, strict_error_bound, 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.

Step-by-step derivation

S001 · implies

Before

source roles = [uniform-epsilon-index]

After

derived = [[error_scale, epsilon, N, error_at_N, strict_error_bound, certificate]]

Conditions: none

List the complete source field order and mode-specific roles without JavaScript or answer-shape inference;No,undefined and infinity retain their distinct meanings.

Step identifiers and dependencies

Rule: source_ordered_fields_without_JS · Uses: G001

S002 · calculation

Before

Uniform ORIGINAL error divided by epsilon := div(25, 5/11)

After

Uniform ORIGINAL error divided by epsilon = 55

Conditions: none

Substitute original roles and established intermediates exactly;no approximation,slot substitution or internally consistent changed operand.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S001

S003 · calculation

Before

Uniform ORIGINAL error at FIRST positive N := div(25, 56)

After

Uniform ORIGINAL error at FIRST positive N = 25/56

Conditions: none

Substitute original roles and established intermediates exactly;no approximation,slot substitution or internally consistent changed operand.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S002

S004 · calculation

Before

Uniform previous positive index error := div(25, 55)

After

Uniform previous positive index error = 5/11

Conditions: none

Substitute original roles and established intermediates exactly;no approximation,slot substitution or internally consistent changed operand.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S003

S005 · implies

Before

source roles = [25, 5/11, 55, 55]

After

derived = [25/56, 5/11, Yes, Yes]

Conditions: none

E/(n+1)<epsilon iff n+1>E/epsilon.The positive integer N=max(1,floor(E/epsilon)) makes N+1 strictly larger,including exact-division cases.If N>1,the previous positive index has error E/N>=epsilon,so N is minimal.For every n>=N the sup error decreases;the same N controls all x.No ceil or N=0 substitution.

Step identifiers and dependencies

Rule: Uniform_FIRST_positive_N_strict_all_x_all_later_n · Uses: G001, S004

Reverse checks

  • S005 · premise_and_result_audit — Reverse-check the complete original data,step operands and premises;finite checks,conditional named-theorem use and general formal proof remain distinct.
  • S004 · premise_and_result_audit — Recompute Uniform previous positive index error with exact rational arithmetic, not rounded decimals.
  • S003 · premise_and_result_audit — Recompute Uniform ORIGINAL error at FIRST positive N with exact rational arithmetic, not rounded decimals.
  • S002 · premise_and_result_audit — Recompute Uniform ORIGINAL error divided by epsilon with exact rational arithmetic, not rounded decimals.
  • S001 · premise_and_result_audit — Reverse-check the complete original data,step operands and premises;finite checks,conditional named-theorem use and general formal proof remain distinct.

Result

(25, 5/11, 55, 25/56, Yes, same_N_controls_every_x_in_[0,1])

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: 7961b224ca25971f523e9c93d90f08476a386fe6b2db7b2850da8534b9f2361e
  • candidate record SHA-256: 37430ff3cde96b9c18533547c9a0f4a54211ae1ed01c8dad55b0e7284dcdfbb7
  • semantic review receipt SHA-256: 1b7a62514347b82518305d5feb4369a52d7d44c442a0f2b131e9eb3cd7b45f62
  • question-first witness SHA-256: 79dc2a1077081f3ea2a03f75e32778163bf05e814cdf4c29ed86e567295f9ee1
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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