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第 23998 題:NFA到DFA的子集合構造

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  1. 原題與已知條件
  2. 定義與適用範圍
  3. 逐步推導
  4. 逐步反向核對
  5. 結論
  6. 本題覆核與來源綁定

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← 逐題詳解目錄 · 原題批次

R0046-23998 · q-20261014-advance-20261112-r07-subset-construction-nfa-to-dfa-0048

原題與已知條件

epsilon-closed start、move後closure與accepting-subset交集規則。操作=subsetdfa-symbol-transition;資料={"states":["s22","m22","f22","e122","e222","d22"],"alphabet":["a22","b22"],"start_state":"s22","final_states":["f22"],"transitions":[["s22",null,"m22"],["s22",null,"d22"],["m22","a22","m22"],["m22","b22","f22"],["f22",null,"e122"],["e122",null,"e222"]],"subset":["s22","m22","d22"],"symbol":"a22"}。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-symbol-transition;資料={"states":["s22","m22","f22","e122","e222","d22"],"alphabet":["a22","b22"],"start_state":"s22","final_states":["f22"],"transitions":[["s22",null,"m22"],["s22",null,"d22"],["m22","a22","m22"],["m22","b22","f22"],["f22",null,"e122"],["e122",null,"e222"]],"subset":["s22","m22","d22"],"symbol":"a22"}。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。

逐步推導

S001 · implies

操作前

source operation=subsetdfa-symbol-transition;original snapshot and mathematics retained

操作後

explicit ordered source output fields=[subset, symbol, symbol_targets, epsilon_closed_targets, empty_dead_state, 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=[s22, m22, f22, e122, e222, d22],alphabet=[a22, b22],start=s22;ORIGINAL transition order=[[s22, null, m22], [s22, null, d22], [m22, a22, m22], [m22, b22, f22], [f22, null, e122], [e122, null, e222]]

操作後

final set normalized UTF16=[f22];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 one-symbol transition:EXACT ORIGINAL supplied S=[d22, m22, s22];symbol=a22;ALL matching ORIGINAL edge rows=[[2, m22, m22]]

操作後

direct symbol targets=[m22];NO EPS preclosure inserted into S;now close ONLY these targets

條件:無

任意給定S未必已EPS-closed,先preclose會改本題運算;定義明示先move(S,a)再closure。empty move得到合法empty dead state。

步驟識別與依賴

規則:subsetdfa_GIVEN_S_symbol_move_BEFORE_closure_NO_preclose · 依賴:G001, S002

S004 · implies

操作前

Subset DFA ORIGINAL one-symbol transition post-symbol EPS closure:stage=0;seed set=[m22];previous set=[m22]

操作後

ALL [ORIGINAL edge index,from,to,enabled] EPS rows=[[0, s22, m22, 否], [1, s22, d22, 否], [4, f22, e122, 否], [5, e122, e222, 否]];next set=[m22];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

([d22, m22, s22], a22, [m22], [m22], 否, delta_D_equals_epsilon_closure_after_symbol_move_and_empty_subset_is_a_legal_dead_state)

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: 31ccfabc4eba972fe3eb998814bd17644404deef658c4c4a33da7aabf62d618f
  • candidate record SHA-256: 74ccf776ce48c618457c92d94e67131deab21b77d941ae7d504bc5cd4a5dfe67
  • semantic review receipt SHA-256: a7c0d888ade6d307703c4222c4137c78c0d2448babdcba2fa3446fe6fdd343c1
  • question-first witness SHA-256: c9571f97a37d503ad6a61034cc00108543a05c37ef246d1c4962f55136a3de02
  • Lean: NOT_RUN · human review: NOT_PERFORMED
同源完整 JSON