# 第 23945 題：NFA到DFA的子集合構造 [返回所在分頁 120](https://ocme.evemisslab.com/zh-Hant/questions/page/120/) [← 逐題詳解目錄](https://ocme.evemisslab.com/zh-Hant/questions/) · [原題批次](https://ocme.evemisslab.com/zh-Hant/practice/batch-20261014-advance-20261112-r07-subset-construction-nfa-to-dfa-foundations/#q-20261014-advance-20261112-r07-subset-construction-nfa-to-dfa-0020) 本頁是已完成第二對話 AI 數理與中英語義覆核的教學詳解，只支持本題明示的模型與前提。沒有人工審查或新 Lean 證明，也不提升原題或 MKO 的 Canonical 真值狀態。 R0046-23945 · q-20261014-advance-20261112-r07-subset-construction-nfa-to-dfa-0020 ## 原題與已知條件 epsilon-closed start、move後closure與accepting-subset交集規則。操作=subsetdfa-epsilon-start；資料={"states":["s19","m19","f19","e119","e219","d19"],"alphabet":["a19","b19"],"start_state":"s19","final_states":["f19"],"transitions":[["s19",null,"m19"],["s19",null,"d19"],["m19","a19","m19"],["m19","b19","f19"],["f19",null,"e119"],["e119",null,"e219"]]}。請依 exact_ordered_tuple_declared_by_interface 欄序回答。 - G001 — epsilon-closed start、move後closure與accepting-subset交集規則。操作=subsetdfa-epsilon-start；資料={"states":["s19","m19","f19","e119","e219","d19"],"alphabet":["a19","b19"],"start_state":"s19","final_states":["f19"],"transitions":[["s19",null,"m19"],["s19",null,"d19"],["m19","a19","m19"],["m19","b19","f19"],["f19",null,"e119"],["e119",null,"e219"]]}。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-subset-construction-nfa-to-dfa](https://ocme.evemisslab.com/zh-Hant/mko/mko-subset-construction-nfa-to-dfa/) ## 逐步推導 S001 · implies操作前 source operation=subsetdfa-epsilon-start;original snapshot and mathematics retained 操作後 explicit ordered source output fields=[NFA_start, DFA_start_subset, epsilon_closed_certificate, certificate] 條件：無 保留原題介面快照，本頁直接列來源欄序，不需JavaScript。radius由原mode選6／11欄，不補欄；No與實際否定依來源責任分清。 步驟識別與依賴規則：source_ordered_interface_explicit_without_javascript · 依賴：G001 S002 · implies操作前 ORIGINAL states=[s19, m19, f19, e119, e219, d19],alphabet=[a19, b19],start=s19;ORIGINAL transition order=[[s19, null, m19], [s19, null, d19], [m19, a19, m19], [m19, b19, f19], [f19, null, e119], [e119, null, e219]] 操作後 final set normalized UTF16=[f19];states nonempty,alphabet/finals/relation MAYEMPTY;DUPLICATE triples rejected in THIS model 條件：無 此題與前一NFA節點不同：transition triple須唯一，finals須排序。所有subset都是真carrier子集合；不偷用舊wrapper的duplicate／final-order慣例。 步驟識別與依賴規則：subsetdfa_qualified_NFA_signature_DUPLICATE_edges_REJECTED_here · 依賴：G001, S001 S003 · implies操作前 Subset DFA ORIGINAL start:stage=0;seed set=[s19];previous set=[s19] 操作後 ALL [ORIGINAL edge index,from,to,enabled] EPS rows=[[0, s19, m19, 是], [1, s19, d19, 是], [4, f19, e119, 否], [5, e119, e219, 否]];next set=[d19, m19, s19];stable=否 條件：無 新增state都有前一層有限EPS路徑，任何含seed的EPS封閉集合都必含每層；有限states使飽和終止，得到完整且最小closure，不消耗input。 步驟識別與依賴規則：subsetdfa_ALL_EPS_fixedpoint_reachability_not_input_consumption · 依賴：G001, S002 S004 · implies操作前 Subset DFA ORIGINAL start:stage=1;seed set=[s19];previous set=[d19, m19, s19] 操作後 ALL [ORIGINAL edge index,from,to,enabled] EPS rows=[[0, s19, m19, 是], [1, s19, d19, 是], [4, f19, e119, 否], [5, e119, e219, 否]];next set=[d19, m19, s19];stable=是 條件：無 新增state都有前一層有限EPS路徑，任何含seed的EPS封閉集合都必含每層；有限states使飽和終止，得到完整且最小closure，不消耗input。 步驟識別與依賴規則：subsetdfa_ALL_EPS_fixedpoint_reachability_not_input_consumption · 依賴：G001, S003 ## 逐步反向核對 - 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 (s19, [d19, m19, s19], 是, DFA_start_is_epsilon_closure_of_the_NFA_start_singleton) 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。 來源雜湊與覆核憑證 - input commit: 0f7be61e2c22317a4075561dc822c87d881a50db - original question SHA-256: 6112c968f290edd7ecdc6388d4417623a585e258405b3648b43e5a0bfc0110b8 - candidate record SHA-256: a4c343209384a0444286ec0089d21465a3d3634299a0b0dac9186b12b9c888da - semantic review receipt SHA-256: a7c0d888ade6d307703c4222c4137c78c0d2448babdcba2fa3446fe6fdd343c1 - question-first witness SHA-256: c9571f97a37d503ad6a61034cc00108543a05c37ef246d1c4962f55136a3de02 - Lean: NOT_RUN · human review: NOT_PERFORMED [同源完整 JSON](https://ocme.evemisslab.com/data/question-derivations/questions/q-20261014-advance-20261112-r07-subset-construction-nfa-to-dfa-0020.json)