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R0002-01518 · q-20261013-advance-20261020-r01-discrete-dynamical-system-0068
Use the complete finite self-map on Fin(10)={0,…,9} given by T(x)=(a*x+b) mod 10, a=13, b=35. Choose the least nonnegative residue, including for negative a*x+b. Time is discrete, indexed from 0; a finite orbit is not a general stability result. Give (modulus, a, b, every x with T(x)=x in increasing order).
G001 — Use the complete finite self-map on Fin(10)={0,…,9} given by T(x)=(a*x+b) mod 10, a=13, b=35. Choose the least nonnegative residue, including for negative a*x+b. Time is discrete, indexed from 0; a finite orbit is not a general stability result. Give (modulus, a, b, every x with T(x)=x in increasing order).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.
Before
X={0 through 9}; T(x)=(13x+(35)) mod 10After
remainder representative always lies in X
Conditions: none
Fix the full finite state carrier and the same update rule;negative integers also use the standard remainder from0 through n−1.
Rule: finite_total_map · Uses: G001
Before
candidate0: a·x := mul(13, 0)
After
candidate0: a·x = 0
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S001
Before
candidate0: a·x+b := sum(0, 35)
After
candidate0: a·x+b = 35
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S002
Before
reduce 35 modulo 10
After
35=3·10+5
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S003
Before
T(0)=5
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S004
Before
candidate1: a·x := mul(13, 1)
After
candidate1: a·x = 13
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S005
Before
candidate1: a·x+b := sum(13, 35)
After
candidate1: a·x+b = 48
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S006
Before
reduce 48 modulo 10
After
48=4·10+8
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S007
Before
T(1)=8
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S008
Before
candidate2: a·x := mul(13, 2)
After
candidate2: a·x = 26
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S009
Before
candidate2: a·x+b := sum(26, 35)
After
candidate2: a·x+b = 61
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S010
Before
reduce 61 modulo 10
After
61=6·10+1
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S011
Before
T(2)=1
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S012
Before
candidate3: a·x := mul(13, 3)
After
candidate3: a·x = 39
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S013
Before
candidate3: a·x+b := sum(39, 35)
After
candidate3: a·x+b = 74
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S014
Before
reduce 74 modulo 10
After
74=7·10+4
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S015
Before
T(3)=4
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S016
Before
candidate4: a·x := mul(13, 4)
After
candidate4: a·x = 52
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S017
Before
candidate4: a·x+b := sum(52, 35)
After
candidate4: a·x+b = 87
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S018
Before
reduce 87 modulo 10
After
87=8·10+7
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S019
Before
T(4)=7
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S020
Before
candidate5: a·x := mul(13, 5)
After
candidate5: a·x = 65
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S021
Before
candidate5: a·x+b := sum(65, 35)
After
candidate5: a·x+b = 100
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S022
Before
reduce 100 modulo 10
After
100=10·10+0
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S023
Before
T(5)=0
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S024
Before
candidate6: a·x := mul(13, 6)
After
candidate6: a·x = 78
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S025
Before
candidate6: a·x+b := sum(78, 35)
After
candidate6: a·x+b = 113
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S026
Before
reduce 113 modulo 10
After
113=11·10+3
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S027
Before
T(6)=3
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S028
Before
candidate7: a·x := mul(13, 7)
After
candidate7: a·x = 91
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S029
Before
candidate7: a·x+b := sum(91, 35)
After
candidate7: a·x+b = 126
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S030
Before
reduce 126 modulo 10
After
126=12·10+6
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S031
Before
T(7)=6
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S032
Before
candidate8: a·x := mul(13, 8)
After
candidate8: a·x = 104
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S033
Before
candidate8: a·x+b := sum(104, 35)
After
candidate8: a·x+b = 139
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S034
Before
reduce 139 modulo 10
After
139=13·10+9
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S035
Before
T(8)=9
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S036
Before
candidate9: a·x := mul(13, 9)
After
candidate9: a·x = 117
Conditions: none
Multiply the original coefficient by the current state;do not clip negative values to0.
Rule: exact_rational_arithmetic · Uses: G001, S037
Before
candidate9: a·x+b := sum(117, 35)
After
candidate9: a·x+b = 152
Conditions: none
Add the same offset before reducing modulo n.
Rule: exact_rational_arithmetic · Uses: G001, S038
Before
reduce 152 modulo 10
After
152=15·10+2
Conditions: none
The integer identity together with0≤remainder<n determines the next state.
Rule: euclidean_remainder · Uses: G001, S039
Before
T(9)=2
After
fixed-point condition T(x)=x: No
Conditions: none
A fixed point must remain the same state after updating;merely remaining in the carrier is insufficient.
Rule: fixed_point_equality · Uses: G001, S040
Before
all 10 carrier elements audited
After
complete fixed set=[]
Conditions: none
The full finite carrier was exhausted,so no fixed point is omitted;an empty list means this T has none.
Rule: exhaustive_fixed_inventory · Uses: G001, S041
S042 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.S041 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.S040 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.S039 · premise_and_result_audit — Recompute candidate9: a·x+b with exact rational arithmetic, not rounded decimals.S038 · premise_and_result_audit — Recompute candidate9: a·x with exact rational arithmetic, not rounded decimals.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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.S035 · premise_and_result_audit — Recompute candidate8: a·x+b with exact rational arithmetic, not rounded decimals.S034 · premise_and_result_audit — Recompute candidate8: a·x 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.S031 · premise_and_result_audit — Recompute candidate7: a·x+b with exact rational arithmetic, not rounded decimals.S030 · premise_and_result_audit — Recompute candidate7: a·x 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.S027 · premise_and_result_audit — Recompute candidate6: a·x+b with exact rational arithmetic, not rounded decimals.S026 · premise_and_result_audit — Recompute candidate6: a·x with exact rational arithmetic, not rounded decimals.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 — Recompute candidate5: a·x+b with exact rational arithmetic, not rounded decimals.S022 · premise_and_result_audit — Recompute candidate5: a·x with exact rational arithmetic, not rounded decimals.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 candidate4: a·x+b with exact rational arithmetic, not rounded decimals.S018 · premise_and_result_audit — Recompute candidate4: a·x 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.S015 · premise_and_result_audit — Recompute candidate3: a·x+b with exact rational arithmetic, not rounded decimals.S014 · premise_and_result_audit — Recompute candidate3: a·x with exact rational arithmetic, not rounded decimals.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 — Recompute candidate2: a·x+b with exact rational arithmetic, not rounded decimals.S010 · premise_and_result_audit — Recompute candidate2: a·x with exact rational arithmetic, not rounded decimals.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 — Recompute candidate1: a·x+b with exact rational arithmetic, not rounded decimals.S006 · premise_and_result_audit — Recompute candidate1: a·x 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 — Check against the original data and this step's premises; a one-way implication is not an equivalence.S003 · premise_and_result_audit — Recompute candidate0: a·x+b with exact rational arithmetic, not rounded decimals.S002 · premise_and_result_audit — Recompute candidate0: a·x 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.(10, 13, 35, [])
The full substitutions and premise checks give the original answer; source identity,format and status are unchanged.
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.
input commit: 0f7be61e2c22317a4075561dc822c87d881a50dboriginal question SHA-256: 39c48d81f74ff13d8bcad733f3395e17efc4f5ef374a020a0c1f72a3c0cc473acandidate record SHA-256: 54864679d2d0c3e1fc98e28899af66fc5b41e9f8a03d6cd88c2d6b36a096e6absemantic review receipt SHA-256: 340d74dcc6e37df6249594a0b79a9ee2af804337b7847478b3c1342af9722861question-first witness SHA-256: 9a06233d190d31a16f13fb03b6c3ceba4cbb748fff6c997941f66ab1888dcca8Lean: NOT_RUN · human review: NOT_PERFORMED