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Question 8804: Complete Positive Divisor Inventory Including the Zero Case

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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R0016-08804 · q-20261013-advance-20261018-r02-natural-divisibility-0029

Original question and givens

Natural numbers include 0. Every a divides 0; 0 divides b exactly when b=0. Divisibility witnesses are natural-number multipliers, not approximate quotients. b=13. Give (b, all positive divisors in increasing order or all-positive-naturals, count or infinite). This inventory excludes divisor 0 even when b=0.

  • G001 — Natural numbers include 0. Every a divides 0; 0 divides b exactly when b=0. Divisibility witnesses are natural-number multipliers, not approximate quotients. b=13. Give (b, all positive divisors in increasing order or all-positive-naturals, count or infinite). This inventory excludes divisor 0 even when b=0.

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

natural numbers include0;b is divisible by a iff b=a*k for some natural k

After

0 divides only0;every natural divides0

Conditions: none

Divisibility is an existential multiplier relation without presuming a positive or nonzero divisor.Every natural,including0,divides0.A positive-divisor inventory separately excludes0.

Step identifiers and dependencies

Rule: natural_divisibility_zero_scope · Uses: G001

S002 · implies

Before

positive divisor candidate1:divide natural 13 by positive 1

After

13=13·1+0

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S001

S003 · implies

Before

positive divisor candidate1:a=1;b=13;quotient=13;remainder=0

After

divides=Yes;witness/status=13

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S002

S004 · implies

Before

positive divisor candidate2:divide natural 13 by positive 2

After

13=6·2+1

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S003

S005 · implies

Before

positive divisor candidate2:a=2;b=13;quotient=6;remainder=1

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S004

S006 · implies

Before

positive divisor candidate3:divide natural 13 by positive 3

After

13=4·3+1

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S005

S007 · implies

Before

positive divisor candidate3:a=3;b=13;quotient=4;remainder=1

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S006

S008 · implies

Before

positive divisor candidate4:divide natural 13 by positive 4

After

13=3·4+1

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S007

S009 · implies

Before

positive divisor candidate4:a=4;b=13;quotient=3;remainder=1

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S008

S010 · implies

Before

positive divisor candidate5:divide natural 13 by positive 5

After

13=2·5+3

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S009

S011 · implies

Before

positive divisor candidate5:a=5;b=13;quotient=2;remainder=3

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S010

S012 · implies

Before

positive divisor candidate6:divide natural 13 by positive 6

After

13=2·6+1

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S011

S013 · implies

Before

positive divisor candidate6:a=6;b=13;quotient=2;remainder=1

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S012

S014 · implies

Before

positive divisor candidate7:divide natural 13 by positive 7

After

13=1·7+6

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S013

S015 · implies

Before

positive divisor candidate7:a=7;b=13;quotient=1;remainder=6

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S014

S016 · implies

Before

positive divisor candidate8:divide natural 13 by positive 8

After

13=1·8+5

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S015

S017 · implies

Before

positive divisor candidate8:a=8;b=13;quotient=1;remainder=5

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S016

S018 · implies

Before

positive divisor candidate9:divide natural 13 by positive 9

After

13=1·9+4

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S017

S019 · implies

Before

positive divisor candidate9:a=9;b=13;quotient=1;remainder=4

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S018

S020 · implies

Before

positive divisor candidate10:divide natural 13 by positive 10

After

13=1·10+3

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S019

S021 · implies

Before

positive divisor candidate10:a=10;b=13;quotient=1;remainder=3

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S020

S022 · implies

Before

positive divisor candidate11:divide natural 13 by positive 11

After

13=1·11+2

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S021

S023 · implies

Before

positive divisor candidate11:a=11;b=13;quotient=1;remainder=2

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S022

S024 · implies

Before

positive divisor candidate12:divide natural 13 by positive 12

After

13=1·12+1

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S023

S025 · implies

Before

positive divisor candidate12:a=12;b=13;quotient=1;remainder=1

After

divides=No;witness/status=does not exist

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S024

S026 · implies

Before

positive divisor candidate13:divide natural 13 by positive 13

After

13=1·13+0

Conditions: none

A positive divisor gives a unique quotient/remainder with0≤r<divisor.The full equality audits both values without division by zero.

Step identifiers and dependencies

Rule: natural_euclidean_division_witness · Uses: G001, S025

S027 · implies

Before

positive divisor candidate13:a=13;b=13;quotient=1;remainder=0

After

divides=Yes;witness/status=1

Conditions: none

For positive a,a zero remainder makes the quotient a natural multiplier witness.A nonzero remainder rules out divisibility by uniqueness;the truncated quotient is not a witness.

Step identifiers and dependencies

Rule: positive_divisor_remainder_criterion · Uses: G001, S026

S028 · implies

Before

positive b=13;complete candidate interval=[1,13]

After

positive divisors=[1, 13];count=2

Conditions: none

If positive d divides positive b,then b=d*k with k≥1,so d≤b.Thus1 through b is the complete candidate domain,not a sample of some factors.

Step identifiers and dependencies

Rule: complete_positive_divisor_bound · Uses: G001, S027

Reverse checks

  • S028 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S025 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S018 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S015 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S011 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • 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 — 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

(13, [1, 13], 2)

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: 25bb635390428fc378dcdfeaa7af2fe96250dbd551b5ef469503d2a6c253883b
  • candidate record SHA-256: fad0d32ffedae526f35e8d97fb4f823da9200e6bd2a3397df99f0fabca082280
  • semantic review receipt SHA-256: 00fcddb10a9fb0f56697308976a52e68e2537472bd8e68ecbe96d3c4553f4ad2
  • question-first witness SHA-256: 198e04380b2d32aef2375b07ca0df1f8afa454d1184993173fad8a3c9187a3d1
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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