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Question 11338: A Row Initial Law Advances by mu*P

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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R0021-11338 · q-20261013-advance-20261024-r03-finite-markov-chain-0038

Original question and givens

Use one fixed finite time-homogeneous transition table=[[13/15, 2/15], [7/8, 1/8]]. Rows denote the current state and columns the next state; row entries must be nonnegative and sum exactly to 1 before stepping. State order stays fixed. Use exact rational arithmetic, reduce fractions to positive denominators and omit /1 for integer outputs. No stationary, irreducibility, ergodicity or long-term convergence claim follows. Require a qualified kernel and initial law=[13/14, 1/14] with nonnegative entries and exact total 1. Give (initial law,transition table,next law), where next[j]=sum_i initial[i]*P[i][j].

  • G001 — Use one fixed finite time-homogeneous transition table=[[13/15, 2/15], [7/8, 1/8]]. Rows denote the current state and columns the next state; row entries must be nonnegative and sum exactly to 1 before stepping. State order stays fixed. Use exact rational arithmetic, reduce fractions to positive denominators and omit /1 for integer outputs. No stationary, irreducibility, ergodicity or long-term convergence claim follows. Require a qualified kernel and initial law=[13/14, 1/14] with nonnegative entries and exact total 1. Give (initial law,transition table,next law), where next[j]=sum_i initial[i]*P[i][j].

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

transition row0:raw rational pairs=[[13, 15], [2, 15]]

After

transition row0:normalized=[13/15, 2/15]

Conditions: none

Every original denominator must be nonzero.Reduce fractions to positive denominators without decimal approximation.

Step identifiers and dependencies

Rule: exact_weight_normalization · Uses: G001

S002 · calculation

Before

transition row0 total := sum(13/15, 2/15)

After

transition row0 total = 1

Conditions: none

Compute exactly with this step's specified roles,retaining signs,denominators and original pairings.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S001

S003 · implies

Before

transition row0:weights=[13/15, 2/15];sum=1

After

nonnegative=Yes;total_one=Yes;qualified=Yes

Conditions: none

Check nonnegativity and exact total one separately.Zero weights are allowed;negative weights or near-one totals are not repaired.

Step identifiers and dependencies

Rule: separate_weight_guards · Uses: G001, S002

S004 · implies

Before

transition row1:raw rational pairs=[[7, 8], [1, 8]]

After

transition row1:normalized=[7/8, 1/8]

Conditions: none

Every original denominator must be nonzero.Reduce fractions to positive denominators without decimal approximation.

Step identifiers and dependencies

Rule: exact_weight_normalization · Uses: G001, S003

S005 · calculation

Before

transition row1 total := sum(7/8, 1/8)

After

transition row1 total = 1

Conditions: none

Compute exactly with this step's specified roles,retaining signs,denominators and original pairings.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S004

S006 · implies

Before

transition row1:weights=[7/8, 1/8];sum=1

After

nonnegative=Yes;total_one=Yes;qualified=Yes

Conditions: none

Check nonnegativity and exact total one separately.Zero weights are allowed;negative weights or near-one totals are not repaired.

Step identifiers and dependencies

Rule: separate_weight_guards · Uses: G001, S005

S007 · implies

Before

complete transition matrix=[[13/15, 2/15], [7/8, 1/8]];row sums=[1, 1]

After

nonnegative=Yes;row_stochastic=Yes;rows=current state, columns=next state

Conditions: none

Every complete row must be nonnegative with exact sum1;column sums are not the convention.This fixed time-homogeneous Markov model gives no stationary,ergodic or long-term convergence theorem.

Step identifiers and dependencies

Rule: whole_row_stochastic_kernel_convention · Uses: G001, S006

S008 · implies

Before

initial law:raw rational pairs=[[13, 14], [1, 14]]

After

initial law:normalized=[13/14, 1/14]

Conditions: none

Every original denominator must be nonzero.Reduce fractions to positive denominators without decimal approximation.

Step identifiers and dependencies

Rule: exact_weight_normalization · Uses: G001, S007

S009 · calculation

Before

initial law total := sum(13/14, 1/14)

After

initial law total = 1

Conditions: none

Compute exactly with this step's specified roles,retaining signs,denominators and original pairings.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S008

S010 · implies

Before

initial law:weights=[13/14, 1/14];sum=1

After

nonnegative=Yes;total_one=Yes;qualified=Yes

Conditions: none

Check nonnegativity and exact total one separately.Zero weights are allowed;negative weights or near-one totals are not repaired.

Step identifiers and dependencies

Rule: separate_weight_guards · Uses: G001, S009

S011 · implies

Before

initial row law=[13/14, 1/14];transition=[[13/15, 2/15], [7/8, 1/8]]

After

next[j]=sum_i initial[i]*P[i][j] over every current state

Conditions: none

Partition by current state and use total probability.The initial row law multiplies P on the right;do not transpose or assume a uniform law.

Step identifiers and dependencies

Rule: markov_total_probability_current_to_next · Uses: G001, S010

S012 · calculation

Before

next state0 current0 term := mul(13/14, 13/15)

After

next state0 current0 term = 169/210

Conditions: none

Compute exactly with this step's specified roles,retaining signs,denominators and original pairings.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S011

S013 · calculation

Before

next state0 current1 term := mul(1/14, 7/8)

After

next state0 current1 term = 1/16

Conditions: none

Compute exactly with this step's specified roles,retaining signs,denominators and original pairings.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S012

S014 · calculation

Before

next state0 total := sum(169/210, 1/16)

After

next state0 total = 1457/1680

Conditions: none

Compute exactly with this step's specified roles,retaining signs,denominators and original pairings.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S013

S015 · calculation

Before

next state1 current0 term := mul(13/14, 2/15)

After

next state1 current0 term = 13/105

Conditions: none

Compute exactly with this step's specified roles,retaining signs,denominators and original pairings.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S014

S016 · calculation

Before

next state1 current1 term := mul(1/14, 1/8)

After

next state1 current1 term = 1/112

Conditions: none

Compute exactly with this step's specified roles,retaining signs,denominators and original pairings.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S015

S017 · calculation

Before

next state1 total := sum(13/105, 1/112)

After

next state1 total = 223/1680

Conditions: none

Compute exactly with this step's specified roles,retaining signs,denominators and original pairings.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S016

Reverse checks

  • S017 · premise_and_result_audit — Recompute next state1 total with exact rational arithmetic, not rounded decimals.
  • S016 · premise_and_result_audit — Recompute next state1 current1 term with exact rational arithmetic, not rounded decimals.
  • S015 · premise_and_result_audit — Recompute next state1 current0 term with exact rational arithmetic, not rounded decimals.
  • S014 · premise_and_result_audit — Recompute next state0 total with exact rational arithmetic, not rounded decimals.
  • S013 · premise_and_result_audit — Recompute next state0 current1 term with exact rational arithmetic, not rounded decimals.
  • S012 · premise_and_result_audit — Recompute next state0 current0 term with exact rational arithmetic, not rounded decimals.
  • 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 — Recompute initial law total with exact rational arithmetic, not rounded decimals.
  • 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 — Recompute transition row1 total with exact rational arithmetic, not rounded decimals.
  • 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 — Recompute transition row0 total 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

([13/14, 1/14], [[13/15, 2/15], [7/8, 1/8]], [1457/1680, 223/1680])

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: ba43768bb7217b079ea9b097c462549f4baf6bbb8668c13b5fbd4efe3a5ba90e
  • candidate record SHA-256: 18d055662e4b4fedbeb4ae92eee21c85080291eb6bbf1fa8b50c613843214a2c
  • semantic review receipt SHA-256: 47d23d3735987d68e27733b051bdfa80a3616d44fb223b82bf2e6c8e46d49258
  • question-first witness SHA-256: a857db558000724020d2d5e815cb6bc3e2c9e2933df295bf33eb478d3c695139
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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