第 23271 題：非確定有限自動機

原題與已知條件

transition=[from,input-or-null,to]且允許empty alphabet/final set的finite epsilon-NFA。操作=nfa-epsilon-closure；資料={"states":["s20","m20","f20","d20"],"alphabet":["a20","b20"],"start_state":"s20","final_states":["f20"],"transitions":[["s20",null,"m20"],["s20",null,"d20"],["m20","a20","m20"],["m20","b20","f20"]],"seed_states":["s20"]}。請依 exact_ordered_tuple_declared_by_interface 欄序回答。

• G001 — transition=[from,input-or-null,to]且允許empty alphabet/final set的finite epsilon-NFA。操作=nfa-epsilon-closure；資料={"states":["s20","m20","f20","d20"],"alphabet":["a20","b20"],"start_state":"s20","final_states":["f20"],"transitions":[["s20",null,"m20"],["s20",null,"d20"],["m20","a20","m20"],["m20","b20","f20"]],"seed_states":["s20"]}。請依 exact_ordered_tuple_declared_by_interface 欄序回答。

定義與適用範圍

沿用原題明示的論域、假設與來源 MKO 定義。本題已完成第二對話數理與中英語義覆核，並由原始參數逐題獨立重算模型、答案與每個算術步驟；原題仍為 candidate。

• mko-nondeterministic-finite-automaton

逐步推導

source operation=nfa-epsilon-closure;original snapshot and mathematics retained

explicit ordered source output fields=[seed_states, epsilon_closure, closure_certificate, certificate]

ORIGINAL transition index=0;[from,input_or_null,to]=[s20, null, m20];state carrier=[s20, m20, f20, d20];alphabet=[a20, b20]

state endpoints legal;symbol either declared input or null EPS consuming0;ORIGINAL row position retained,including duplicate rows

ORIGINAL transition index=1;[from,input_or_null,to]=[s20, null, d20];state carrier=[s20, m20, f20, d20];alphabet=[a20, b20]

state endpoints legal;symbol either declared input or null EPS consuming0;ORIGINAL row position retained,including duplicate rows

ORIGINAL transition index=2;[from,input_or_null,to]=[m20, a20, m20];state carrier=[s20, m20, f20, d20];alphabet=[a20, b20]

state endpoints legal;symbol either declared input or null EPS consuming0;ORIGINAL row position retained,including duplicate rows

ORIGINAL transition index=3;[from,input_or_null,to]=[m20, b20, f20];state carrier=[s20, m20, f20, d20];alphabet=[a20, b20]

state endpoints legal;symbol either declared input or null EPS consuming0;ORIGINAL row position retained,including duplicate rows

ORIGINAL states=[s20, m20, f20, d20],alphabet=[a20, b20],start=s20,final_states=[f20];complete relation=[[s20, null, m20], [s20, null, d20], [m20, a20, m20], [m20, b20, f20]]

states nonempty with actual start;alphabet/final set/relation MAY be EMPTY;definition qualification does NOT prove determinism,totality,DFA equivalence or a successful run

NFA ORIGINAL EPS closure:ORIGINAL seed list=[s20];complete state carrier=[s20, m20, f20, d20]

initialize unique closure=[s20];seeds themselves are reachable by zero EPS steps;RAW seed list not changed

NFA ORIGINAL EPS closure:stage=0;ORIGINAL-relation EPS pass from previous set=[s20]

ALL [ORIGINAL index,from,to,from_in_previous] EPS rows=[[0, s20, m20, 是], [1, s20, d20, 是]];next unique set=[d20, m20, s20];stable=否

NFA ORIGINAL EPS closure:stage=1;ORIGINAL-relation EPS pass from previous set=[d20, m20, s20]

ALL [ORIGINAL index,from,to,from_in_previous] EPS rows=[[0, s20, m20, 是], [1, s20, d20, 是]];next unique set=[d20, m20, s20];stable=是

逐步反向核對

• S009 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S008 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S007 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S006 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S005 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S004 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S003 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S002 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S001 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。

結論

([s20], [d20, m20, s20], 是, finite_epsilon_reachability_without_input_consumption)

依上列完整代值及條件核對得到原題答案；原題編號、格式與狀態保持不變。

本題覆核與來源綁定

覆核日期：2026-10-26

原題、答案、步驟表達式、數值 AST 與既有歷史保持原樣；原來的候選狀態屬於來源歷史，不覆寫為形式化證明。