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「強化学習」輪読会資料

icebee16
December 03, 2019

 「強化学習」輪読会資料

「強化学習」(森村 哲郎)の輪読会資料
第二章を対象にした資料です.基本的には喋る前提の資料なので情報量はほとんどないです.

「強化学習」森村 哲郎
http://bookclub.kodansha.co.jp/product?item=0000275420
勉強会ページ
https://yurufuwa-reading.connpass.com/event/156603/

icebee16

December 03, 2019
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  1. ڧԽֶश ྠಡձ #02, #03
    @icebee__
    CHAPTER 2 ϓϥϯχϯά

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  2. ڧԽֶश ྠಡձ #02, #03 CHAPTER 2
    ABOUT ME
    @icebee__
    •ۚ༥ܥۈΊͷࣾձਓೋ೥໨
    •ڵຯͱͯ͠͸σʔλ෼ੳ΍ػցֶशɼ౷ܭؔ࿈ͷ࿩
    •Kaggle Expert

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  3. CONTENTS
    Chapter 2 ϓϥϯχϯά
    2.1 ४උ
    2.1.1 ໨తؔ਺
    2.1.2 ࠷దՁ஋ؔ਺
    2.2 ಈతܭը๏
    2.2.1 ϕϧϚϯ࡞༻ૉ
    2.2.2 ϕϧϚϯ࡞༻ૉͷ୯ௐੑ
    2.2.3 ಈతܭը๏ͷ਺ཧ
    2.2.4 ࠷దํࡦ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  4. CONTENTS
    Chapter 2 ϓϥϯχϯά
    2.3 ಈతܭը๏ʹΑΔղ๏
    2.3.1 Ձ஋൓෮๏
    2.3.2 ํࡦ൓෮๏
    2.4 ઢܗܭը๏ʹΑΔղ๏
    2.4.1 ओ໰୊ͷಋग़
    2.4.2* ૒ର໰୊ (ࠓճ͸औΓѻΘͳ͍)
    2.4.3* ࠷దղͱ࠷దํࡦ (ࠓճ͸औΓѻΘͳ͍)
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  5. 2.1 ४උ
    ▸ ϓϥϯχϯά໰୊
    ➡ ؀ڥ͕ط஌ͷ৔߹ͷஞ࣍తҙࢥܾఆ໰୊
    ➡ ؀ڥ͕ະ஌ͷ৔߹ʹ͋ͨΔڧԽֶश໰୊ΛऔΓѻ͏্Ͱͷج
    ૅͱͳΔ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  6. 2.1.1 ໨తؔ਺
    ▸ ҎԼͷ໨తؔ਺Λ༻ҙ͢Δ
    ▸ ্͔ࣜΒಋ͔ΕΔ ͸ॳظঢ়ଶ ʹґଘ͢ΔՄೳੑ͕ߟ͑ΒΕΔ͕
    ޙड़(2.2અ)͢Δ໋୊ΑΓ೚ҙͷॳظঢ়ଶʹ͓͍ͯҎԼ͕੒ཱ͢
    Δɽ
    ▸ ΑͬͯఆৗతͳํࡦͷΈΛߟ͑Δ͜ͱͰ໨తؔ਺Λ࠷େԽग़དྷΔɽ
    ͨͩ͠ɼ ͸ୈmཁૉ͕1Ͱଞͷཁૉ͸θϩͷn࣍ݩϕΫτϧ
    Ձ஋ؔ਺ͷॏΈ෇͖࿨
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  7. 2.1.2 ࠷దՁ஋ؔ਺
    ▸ ҎԼͷࣜʹͯ࠷దՁ஋ؔ਺(optimal value function)Λಋೖ
    ▸ Ձ஋ؔ਺ ͸ Λ༻͍ͯҎԼͷ༷ʹهड़Մೳ
    ▸ ͜ΕΑΓ ͸Ϛϧίϑํࡦͷे෼ੑʹؔ͢ΔܥΛຬͨ͠ɼ࠷ద
    Ձ஋ؔ਺ʹ͍ͭͯҎԼͷ͕ࣜ੒Γཱͭɽ
    ॻ੶ࢀߟϖʔδɿp.22
    ಉ࣌पล֬཰ɿ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  8. 2.1.2 ࠷దՁ஋ؔ਺
    ▸ ࠷దՁ஋ؔ਺͸ҎԼͷΑ͏ʹॻ͖ԼͤΔɽ
    ▸ ͜ΕΑΓϕϧϚϯ࠷దํఔࣜ(Bellman optimality equation)ͱݺ
    ͹ΕΔҎԼͷ͕ࣜ੒Γཱͭɽ
    Ϧλʔϯͷ࠶ؼੑɿ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  9. 2.1.2 ࠷దՁ஋ؔ਺
    ▸ ࠷దՁ஋ؔ਺͸ҎԼͷΑ͏ʹॻ͖ԼͤΔɽ
    ▸ ͜ΕΑΓϕϧϚϯ࠷దํఔࣜ(Bellman optimality equation)ͱݺ
    ͹ΕΔҎԼͷ͕ࣜ੒Γཱͭɽ
    Ϧλʔϯͷ࠶ؼੑɿ
    ભҠ֬཰
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  10. 2.2 ಈతܭը๏
    ▸ ಈతܭը๏
    ➡ ஞ࣍తҙࢥܾఆͷ࠷దԽ໰୊Λղ͘Ξϓϩʔνͷ͜ͱ
    ➡ ͨͩ͠ɼ۩ମతͳख๏Λࢦ͢΋ͷͰ͸ͳ͘લड़ͷΑ͏ͳΞϓ
    ϩʔνͷ૯শ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  11. 2.2.1 ϕϧϚϯ࡞༻ૉ
    ▸ ಈతܭը๏Ͱ͸ϕϧϚϯ࡞༻ૉͱݺ͹ΕΔҎԼͷॲཧ Λؔ਺
    ʹ܁Γฦ͠ద༻͢Δ͜ͱͰՁ஋ؔ਺ɼ࠷దՁ஋ؔ਺ʹ͚ۙͮΔɽ
    ▸ ·ͣɼ࣍ͷ̎ͭͷ೚ҙͷؔ਺ʹର͢ΔϕϧϚϯ࡞༻ૉΛಋೖ͢
    Δɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  12. 2.2.1 ϕϧϚϯ࡞༻ૉ
    ▸ ϕϧϚϯظ଴࡞༻ૉ
    ▸ ϕϧϚϯ࠷ద࡞༻ૉ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  13. 2.2.1 ϕϧϚϯ࡞༻ૉ
    ▸ ·ͨɼՃ͑ͯҎԼͷ͍͔ͭ͘ͷه๏Λಋೖ͢Δɽ
    ▸ ؆ศԽ
    ▸ ஞ࣍తͳద༻
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  14. 2.2.1 ϕϧϚϯ࡞༻ૉ
    ▸ ઌΜͯࣔͨ͡͠ϕϧϚϯ࡞༻ૉ͸ͦΕͧΕϕϧϚϯํఔࣜͱҎԼ
    ͷؔ܎Λ࣋ͭɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  15. 2.2.2 ϕϧϚϯ࡞༻ૉͷ୯ௐੑ
    ▸ ิ୊2.1ʢ୯ௐੑͷิ୊ʣ
    ▸ ೚ҙͷؔ਺ͷ૊ʹରͯ͠ϕϧϚϯ࡞༻ૉΛద༻ͯ͠΋ͦͷେখ
    ؔ܎͸อͨΕΔɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  16. 2.2.2 ϕϧϚϯ࡞༻ૉͷ୯ௐੑ
    ▸ ҎԼͷදهΛఆٛ͢Δɽ
    ▸ ͜ͷͱ͖ϕϧϚϯ࡞༻ૉͷఆٛΑΓҎԼ͕ࣔͤΔ
    ▸ ิ୊2.2
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  17. 2.2.3 ಈతܭը๏ͷ਺ཧ
    ▸ ໋୊2.3ʢಈతܭը๏ͷऩଋੑʣ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  18. 2.2.3 ಈతܭը๏ͷ਺ཧ
    ▸ ໋୊2.3ʢಈతܭը๏ͷऩଋੑʣূ໌ϝϞ
    ▸ a. ~ (2.14)
    ▸ ઌʹ্͛ͨิ୊Λ͏·͘࢖͏͚ͩɽ༗քͰ͋Δ͜ͱΛར༻ͯ͠
    ೚ҙͷఆ਺ͰڬΈɼk>∞Ͱఆ਺Λখ͘͢͞Δ͚ͩɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  19. 2.2.3 ಈతܭը๏ͷ਺ཧ
    ▸ ໋୊2.3ʢಈతܭը๏ͷऩଋੑʣূ໌ϝϞ
    ▸ b. ~ (2.16)
    ▸ Ձ஋ؔ਺Λํࡦͷk൪໨Λڥʹ෼ׂ͢Δ͚ͩɽ
    ▸ (2.16) ~ (2.17)
    ▸ ใुؔ਺ͷఆٛ(1.1)ʹै֤ͬͯεςοϓͷใुΛ্͔Β཈͑Δɽ
    ▸ (2.16)ͷӈลೋ߲໨ʹ͍ͭͯղ͍ͯ୅ೖɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  20. 2.2.3 ಈతܭը๏ͷ਺ཧ
    ▸ ໋୊2.3ʢಈతܭը๏ͷऩଋੑʣূ໌ϝϞ
    ▸ (2.17) Լ~ (2.18)
    ▸ ʢp.49ͷԼࣜE[]಺ೋ߲໨ɼγͱSͷఴࣈ͸ޡ২Ͱ͸ʁt > kʣ
    ▸ v(s)ͷظ଴஋͸min(v(s))ͱmax(v(s))ͰڬΊΔɽ
    ▸ ग़དྷͨࣜͱ(2.17)ͷࠩ෼ΛͱΔɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  21. 2.2.3 ಈతܭը๏ͷ਺ཧ
    ▸ ໋୊2.4ʢϕϧϚϯํఔࣜͷղͷҰҙੑʣ
    ▸ എཧ๏Ͱ؆୯ʹূ໌
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  22. 2.2.3 ಈతܭը๏ͷ਺ཧ
    ▸ ิ୊2.5ʢϕϧϚϯ࡞༻ૉͷॖখੑʣ
    ▸ ূ໌͔Βೖͬͨ΄͏͕ཧղ͕ૣ͍ɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  23. 2.2.3 ಈతܭը๏ͷ਺ཧ
    ▸ ิ୊2.5ʢϕϧϚϯ࡞༻ૉͷॖখੑʣূ໌ϝϞ
    ▸ (2.21), (2.22), (2.23)
    ▸ ิ୊2.2͋ͨΓΛ༻͍ͯڬΜͰࣔ͢
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  24. 2.2.3 ಈతܭը๏ͷ਺ཧ
    ▸ ิ୊2.5ʢϕϧϚϯ࡞༻ૉͷॖখੑʣ͔Β
    ▸ (2.23)ͷv’ʹରͯ͠V*Λ୅ೖɼϕϧϚϯ࠷దԽ࡞༻ૉͷෆಈ఺͕
    V*Ͱ͋Δ͜ͱΛ౿·͑Ε͹ҎԼͷ͕ࣜ੒ཱ
    ▸ ͜Ε͸ϕϧϚϯ࠷దԽ࡞༻ૉΛ೚ҙͷؔ਺ʹదԠ͢Δ͜ͱͰ࠷ద
    Ձ஋ؔ਺ͱͦͷؔ਺ͷڑ཭͕γͷൺ཰Ͱࢦ਺ؔ਺తʹখ͘͞ͳͬ
    ͍ͯ͘͜ͱΛࣔ͢ɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  25. 2.2.4 ࠷దํࡦ
    ▸ ఆٛ2.6ʢ࠷దํࡦʣ
    ▸ ͋Δঢ়ଶsͷظ଴ϦλʔϯΛ࠷େʹ͢Δ͜ͱ͸Մೳ͕ͩ೚ҙͷঢ়
    ଶsʹରͯ͜͠ΕΛݴ͏ͷ͸೉͍͠ɼͱ͍͏͚ͩɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  26. 2.2.4 ࠷దํࡦ
    ▸ ໋୊2.7ʢ࠷దํࡦͷଘࡏੑͱඞཁे෼৚݅ʣ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  27. 2.2.4 ࠷దํࡦ
    ▸ ໋୊2.7ʢ࠷దํࡦͷଘࡏੑͱඞཁे෼৚݅ʣূ໌ϝϞ
    ▸ ඞཁ৚݅ɼे෼৚݅
    ▸ ʹରͯ͠ϕϧϚϯظ଴࡞༻ૉΛߟ͑ͨͱ͖ɼ͜ͷෆಈ఺͸
    ิ୊2.4͔ΒҰҙʹ ͕ͩɼ(2.28)ΑΓ Ͱ΋͋ΔɽΑͬͯ
    ͦΕΒ͸Ұக͍ͯ͠Δ
    ▸ ଘࡏ͢Δ͜ͱΛࣔ͢
    ▸ ਖ਼௚Α͘Θ͔͍ͬͯͳ͍ɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  28. 2.2.4 ࠷దํࡦ
    ▸ ໋୊2.7ʢ࠷దํࡦͷଘࡏੑͱඞཁे෼৚݅ʣ͔Β
    ▸ ͷఆٛʹ ΛೖΕͯ͋͛Ε͹ҎԼ͕ݴ͑Δ
    ▸ ॏΈ෇͖Ձ஋ؔ਺ͷఆ͔ٛΒҎԼ
    ▸ ͢ͳΘͪɼ࠷దํࡦͷֶशͱ͸໨తؔ਺ Λ࠷େʹ
    ͢Δํࡦͷ୳ࡧ໰୊Ͱ͋Δͱ͍͑Δɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  29. 2.2.4 ࠷దํࡦ
    ▸ લड़ͨࣜ͠ʹ͍ͭͯ ͱ ͱͳ͍ͬͯΔཧ༝ͱͯ͠͸ɼ = 0ͱ
    ͳ͍ͬͯΔঢ়ଶɼ͢ͳΘͪભҠ͢ΔՄೳੑͷͳ͍ঢ়ଶؒͷύε·
    Ͱ࠷దԽͷର৅ʹ͢Δඞཁ͸ͳ͍͔Βɽ
    ▸ ໋୊2.7ͷ݁Ռ͸ҎԼͷೋ఺ΑΓॏཁ
    ▸ ࠷దԽର৅ͷํࡦू߹Λߟ͑Δʹ͋ͨͬͯ୳ࡧൣғ͸ఆৗͳܾ
    ఆతํࡦͷू߹ͷΈͰ໰୊ͳ͍͜ͱΛอূͨ͜͠ͱɽ
    ▸ ֶश͍ͯ͠ΔՁ஋ؔ਺͕࠷దՁ஋ؔ਺ͱҰக͢Δ͜ͱͰ࠷దํ
    ࡦ͔൱͔Λ൑ఆͰ͖Δ͜ͱɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  30. 2.3 ಈతܭը๏ʹΑΔղ๏
    ▸ ಈతܭը๏ͷ۩ମతͳ࣮૷ͱͯ͠ҎԼͷ2ͭΛ঺հ
    ➡ Ձ஋൓෮๏ʢvalue iteration algorithmʣ
    ➡ ํࡦ൓෮๏ʢpolicy iteration algorithmʣ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  31. 2.3.1 Ձ஋൓෮๏
    ▸ ΞϧΰϦζϜ2.1
    ▸ ऩଋ͕อূ͞Ε͍ͯΔͷͰ୯७ͳ܁Γฦ͠ɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  32. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  33. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ
    ▸ ূ໌ͷৄࡉ͸ิ଍A.1.1(p.250)
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  34. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ऴྃ৚݅ͷᮢ஋ ͱٻ·ΔՁ஋ؔ਺ɼํࡦͷ࣭ʹ͍ͭͯؔ܎ੑ
    Λ֬ೝ
    ▸ ޡࠩݶքͷࣜ(2.32)ΛҎԼͷΑ͏ʹॻ͖׵͑Δɽ
    ▸ ऴྃ৚݅ͷᮢ஋ʹ͍ͭͯఆٛΛ༻͍Ε͹ҎԼͷΑ͏ʹมܗՄೳ
    ▸ ࠷దՁ஋ؔ਺ ͱਪఆՁ஋ؔ਺ ͷ࠷େޡࠩ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  35. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ࣜ(2.34)ΑΓऴྃ൑ఆʹ༻͍Δ ͸ࢦ਺ݮਰ͠ॳظ஋͕༗քͰ
    ͋ΔͨΊՁ஋൓෮๏͸ඞͣ༗ݶͷճ਺Ͱऴྃ͢Δɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  36. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ํࡦ ʹର͢ΔํࡦޡࠩΛҎԼͱఆٛ
    ▸ Ձ஋൓෮๏Ͱٻ·Δํࡦ ʹରͯ͠ϕϧϚϯ࡞༻ૉͷఆ͔ٛΒ
    ҎԼ͕੒Γཱͭɽʢ΄Μͱ͔ʁʣ
    ▸ ࣜ(2.31)΍(2.36)Λ༻͍ͯม׵͢Δ͜ͱͰҎԼ͕੒Γཱͭɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  37. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ษڧձதͰࢀՃऀͷํ͕ࣔͯͩͬͨ͘͠͞(2.40)ͷิ଍
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  38. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ΑͬͯํࡦޡࠩΛᮢ஋ Λ༻͍ͯҎԼͷΑ͏ʹ཈͑Δɽ
    ▸ ্ࣜதͷೋஈ໨͔Βࡾஈ໨͸(2.32)ͱ໋୊2.8 b.ଆͷ(2.32)ͱࣅ
    ͔ͨࣜΒߦ͚ͦ͏ɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  39. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ·ͨՁ஋൓෮๏ͷऴྃ৚݅ΛҎԼͰஔ͖׵͑Δ͜ͱΛߟ͑Δɽ
    ▸ ্৚݅͸ҎԼͷΑ͏ʹॻ͖׵͑ΒΕΔɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  40. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ํࡦޡࠩΛ࣍ͷΑ͏ʹ཈͑Δɽ
    ▸ ࣜ(2.45)Ͱߋʹ্͔Β཈͑ͯ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  41. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ํࡦޡࠩͷҎԼͷࣜͷ ͸ ʁ
    ▸ p.60 (2.47)ࣜ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  42. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ϦλʔϯͷׂҾ཰ ͕ҟͳΔ৔߹
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2
    ※ਤதॎͷࠇઢ͸൓෮ऴྃճ਺N

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  43. 2.3.1 Ձ஋൓෮๏
    ▸ ໋୊2.8ʢಈతܭը๏ͷޡࠩݶքʣ͔Β
    ▸ ऴྃ৚͕݅ҟͳΔ৔߹
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2
    ※ਤதॎͷࠇઢ͸൓෮ऴྃճ਺N

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  44. 2.3.2 ํࡦ൓෮๏
    ▸ ΞϧΰϦζϜ2.2
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  45. 2.3.2 ํࡦ൓෮๏
    ▸ ໋୊2.9ʢํࡦվળͷ୯ௐੑʣ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  46. 2.4 ઢܗܭը๏ʹΑΔղ๏
    ▸ ϓϥϯχϯά໰୊Λղ͘͜ͱ͕ग़དྷΔɽஞ࣍తҙࢥܾఆ໰୊ͷ

    ੑ࣭Λௐ΂Δ্Ͱ΋༗༻ɽ
    ▸ ͳ͓ɼઢܗܭը๏ʹ͓͚Δجຊతͳࣄ߲͸ิ଍A.3(p.266)Λࢀরɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  47. 2.4.1 ओ໰୊ͷಋग़
    ▸ ໋୊2.10ʢ࠷దՁ஋ؔ਺ͷ্քͱԼքʣ
    ▸ Կ౓΋ద༻͢Δ͜ͱͰۃݶΛऔΔ͚ͩɽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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  48. 2.4.1 ओ໰୊ͷಋग़
    ▸ ໋୊2.10ʢ࠷దՁ஋ؔ਺ͷ্քͱԼքʣ͔Β
    ▸ ͜ͷ৚݅Λຬͨ͢࠷খͷ Λߟ͑Δ͜ͱͰ࠷దՁ஋ؔ਺ͷ্
    քͱͳΔؔ਺Λߟ͑Δ͜ͱ͕ग़དྷΔɽ
    ▸ ॏΈؔ਺ Λߟ͑ɼҎԼͰઢܗܭը໰୊ʹఆࣜԽ
    ڧԽֶश ྠಡձ #02, #03 CHAPTER 2

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