抽象化って何？ (What is abstraction?)

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ந৅ԽͬͯԿʁ ޙ౻लએ IJEFOPSJHPUP!HNBJMDPN 1)1FS,BJHJWFS 8IBUJTBCTUSBDUJPO

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ந৅Խ "CTUSBDUJPO

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͜ͷτʔΫͷ໨ඪ

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͜ͷτʔΫͷ໨ඪ w ݱ࣮ੈքʹ͓͚Δந৅Խͱ͸ͲͷΑ͏ͳ͜ͱͳͷ͔ɺཧղ͢Δ

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͜ͷτʔΫͷ໨ඪ w ݱ࣮ੈքʹ͓͚Δந৅Խͱ͸ͲͷΑ͏ͳ͜ͱͳͷ͔ɺཧղ͢Δ w ϓϩάϥϛϯάʹ͓͚Δந৅Խͱ͸ͲͷΑ͏ͳ͜ͱͳͷ͔ɺཧղ͢ Δ

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͜ͷτʔΫͷ໨ඪ w ݱ࣮ੈքʹ͓͚Δந৅Խͱ͸ͲͷΑ͏ͳ͜ͱͳͷ͔ɺཧղ͢Δ w ϓϩάϥϛϯάʹ͓͚Δந৅Խͱ͸ͲͷΑ͏ͳ͜ͱͳͷ͔ɺཧղ͢ Δ w ந৅Խͷࢦ਑Λ஌Γɺந৅Խͷྑ͠ѱ͠Λ൑அͰ͖ΔΑ͏ʹͳΔ

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͓୊આ໌

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γνϡΤʔγϣϯ w ʮ਺ಠʢφϯϓϨɺ/VNCFS1MBDFʣʯͷΞϓϦΛ։ൃ͢Δ

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਺ಠʢφϯϓϨʣͱ͸ʁ

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਺ಠʢφϯϓϨʣͱ͸ʁ ݸͷϚεʹ͓͍ͯɺ ̍ʙ̕ͷ਺ࣈ͕ ॏෳ͍ͯ͠ͳ͍͜ͱ

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γνϡΤʔγϣϯ w ʮ਺ಠʢφϯϓϨɺ/VNCFS1MBDFʣʯͷΞϓϦΛ։ൃ͢Δ w ਺ಠͷʮਖ਼ղνΣοΫػೳʯͷ࣮૷Λ୲౰͢Δ w ϧʔϧΛຬ͍ͨͯ͠Δ͔Ͳ͏͔ʁ w લఏ w ਺ಠͷ͢΂ͯͷϚεʹ਺ࣈ͕ೖ͍ͬͯΔ w ̍ʙ̕ͷ਺ࣈҎ֎ͷೖྗ͸ͳ͍

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࠷ॳͷίʔυ֓ཁ ਺ಠͷϚεͷ৘ใΛ ̎࣍ݩ഑ྻͰอ࣋ ਖ਼ղ͔Ͳ͏͔Λ νΣοΫ͢Δ

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B<J><K> Jଆ͕ߦ

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վળϙΠϯτ͸ͳ͍͔ʁ w ϩδοΫ͸Ͱ͖͍ͯΔɻਖ਼͘͠νΣοΫͰ͖Δɻ w ίʔυΛ੔ཧͰ͖Δؾ͕͢Δɻ͔͠͠ɺͲΜͳΞϓϩʔνͰ΍Δͷ͔ w $IFDLFS͕.BUSJYʹ௚઀ґଘ͍ͯ͠Δͱ͜Ζ͔Βʁ

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ґଘͱ͍͑͹ɾɾɾ ґଘؔ܎ٯసͷݪଇʢ%*1ʣ ͬͯϠπΛ࢖͏ͷ͔ͳɾɾɾ ্ҐϨϕϧͷϞδϡʔϧ͸ԼҐϨϕϧͷϞδϡʔ ϧʹґଘ͢΂͖Ͱ͸ͳ͍ɻ྆ํͱ΋ந৅ ʢBCTUSBDUJPOT ʹґଘ͢΂͖Ͱ͋Δɻ

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ґଘؔ܎ٯసͷݪଇͬͯɺ ؒʹJOUFSGBDFΛ͸͞Ήܗʹ ͢Ε͹ྑ͍ΜͩΑͳɻ ˞஫ҙɿԋग़ͷ౎߹্ͷɺۃ୺ͳཧղྫͰ͢

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ґଘؔ܎ٯసʂ௚઀ґଘͯ͠·ͤΜʂ

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Կ͔ؒҧ͍ͬͯΔ ؾ͕͢Δ

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Ͳ͕ؒ͜ҧ͍ͬͯΔͷ͔આ ໌͍ͯͩ͘͠͞ʂ

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Ͳ͕ؒ͜ҧ͍ͬͯΔͷ͔ʁ

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ந৅Խͱ͸

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ࣙॻతఆٛ ந৅ʢͪΎ͏͠ΐ͏ʣ ࣄ෺΍ද৅Λɺ͋Δੑ ࣭ɾڞ௨ੑɾຊ࣭ʹண ໨͠ɺͦΕΛந͖ग़͠ ͯ೺Ѳ͢Δ͜ͱɻ ࣺ৅ʢ͠Ό͠ΐ͏ʣ ֓೦Λந৅͢Δࡍʹɺ ந৅͞Εͨॾද৅Ҏ֎ ͷද৅Λߟ࡯ͷର৅͔ Β੾ΓࣺͯΔ͜ͱɻ

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4ɾ*ɾϋϠΧϫʮந৅ͷϋγΰʯ ʰࢥߟͱߦಈʹ͓͚ΔݴޠʱQ ܦݧͷର৅ʢ໒ڇʣ Պֶతঢ়ଶʢ໒ ϕογʔ ޠʮ໒ڇʯ Ոச ೶৔ࢿ࢈ ࢿ࢈ ෋ ݴޠ ந৅Խ ந৅Խ ந৅Խ

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ܦݧͷର৅ʢ໒ڇʣ Պֶతঢ়ଶʢ໒ڇʣ ϕογʔ ޠʮ໒ڇʯ Ոச ೶৔ࢿ࢈ ࢿ࢈ ෋

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ϕογʔ ܦݧͷର৅ʢ໒ڇʣ Պֶతঢ়ଶʢ໒ڇʣ ϕογʔ ޠʮ໒ڇʯ Ոச ೶৔ࢿ࢈ ࢿ࢈ ෋

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໒ڇ ϕογʔ ܦݧͷର৅ʢ໒ڇʣ Պֶతঢ়ଶʢ໒ڇʣ ϕογʔ ޠʮ໒ڇʯ Ոச ೶৔ࢿ࢈ ࢿ࢈ ෋

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ந৅Խʹ͓͚ΔมԽ ϕογʔ ޠʮ໒ڇʯ ந৅Խ ಛ௃ͷྔ ଟ͍ গͳ͍ ର৅ͷ਺ গͳ͍ ଟ͍

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ந৅Ϩϕϧ͕͓͔͍͠จ ܦݧͷର৅ʢ໒ڇʣ Պֶతঢ়ଶʢ໒ ϕογʔ ޠʮ໒ڇʯ Ոச ೶৔ࢿ࢈ ࢿ࢈ ෋ ࢲ͸໌೔ͷேɺࢲୡͷࢿ࢈ʹ㕒 Λ༩͑ͳ͚Ε͹͍͚ͳ͍ ࢿ࢈ 㕒 ผͷந৅ Ϩϕϧ͕ ࠞࡏ͍ͯ͠ Δʂ

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ந৅Խͷ·ͱΊ w ந৅ʹ͸Ϩϕϧ͕͋Δʢந৅ͷϋγΰʣ w ϋγΰΛ্Δʹ͸ɺಛ௃Λ੾Γࣺͯͯந৅Խ͢Δ  ಛ௃ྔ͸ݮΔ͕ɺΑΓଟ͕͘ର৅ʹೖΔ w ந৅ͷϨϕϧ͕ἧ͍ͬͯͳ͍ͱɺίϛϡχέʔγϣϯͰ͖ͳ͍

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ϓϩάϥϛϯάʹ͓͚Δ ந৅Խͱ͸

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ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք

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ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք ࢿ࢈ 㕒 ͓ۚ ϕογʔ

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ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք ࢿ࢈ 㕒 ͓ۚ ϕογʔ ฼ࠃޠɺߏจɺޠኮ ಓ ۩

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ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք ࢿ࢈ 㕒 ͓ۚ ϕογʔ .BUSJY νΣοΫ Ϛε ϧʔϧ ฼ࠃޠɺߏจɺޠኮ ಓ ۩

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ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք ࢿ࢈ 㕒 ͓ۚ ϕογʔ .BUSJY νΣοΫ Ϛε ϧʔϧ ฼ࠃޠɺߏจɺޠኮ ϓϩάϥϛϯάݴޠɺߏจɺޠኮ ಓ ۩

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ϓϩάϥϛϯάʹ͓͚Δந৅Խͱ͸ ѻ͍ͬͯΔ໰୊΍֓೦ͷந৅Խ *OUFSGBDF΍"CTUSBDUDMBTTΛ࢖͏͜ ͱ ͜ΕΛୡ੒͢ΔͨΊʹɺݴޠʹ༻ҙ͞Ε ͍ͯΔ༷ʑͳػೳΛ࢖͏ʢ*OUFSGBDFɺ "CTUSBDUɺFUDʣ

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ࢦ਑͸ʁ

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ϓϩάϥϛϯάʹ͓͚Δ໰୊ͷந৅Խͷࢦ਑ Ծ ద੾ͳ໋໊ ໊લͱ಺༰͕Ұக ͍ͯ͠Δ͜ͱ ந৅౓ͷ౷Ұ ͋Δଆ໘͕औΓग़ ͞Εͨ΋ͷ͚ͩͰ ⁋᧒͕߹͏͜ͱ ڱ͍ൣғ ߟྀ͢Δಛ௃ͷ਺ ͕খ͘͞ͳ͍ͬͯ Δ͜ͱ ˞஫ҙɿIJEFOPSJHPUPʹΑΔࡶͳఏҊͰ͢

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͜ͷந৅Խ͸Կ͕ؒҧ͍ͬͯͨʁ

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͜ͷந৅Խ͸Կ͕ؒҧ͍ͬͯͨʁ ద੾ͳ໋໊

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͜ͷந৅Խ͸Կ͕ؒҧ͍ͬͯͨʁ ந৅౓ͷ౷Ұ

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ଞʹϝιου ͕͋Δ ͚̍ͭͩ ͜ͷந৅Խ͸Կ͕ؒҧ͍ͬͯͨʁ ڱ͍ൣғ

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͜ͷந৅Խ͸Կ͕ؒҧ͍ͬͯͨʁ ڱ͍ൣғ

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վળྫ

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ґଘؔ܎ͷຊ࣭ΛݟۃΊΔ

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ґଘؔ܎ͷຊ࣭ΛݟۃΊΔ w $IFDLFSͱ.BUSJYͷຊ࣭తͳؔ܎ɺ໾ׂΛߟ͑Δ  $IFDLFS͸ɺ࠷௿ݶԿ͕͋Ε͹੹຿ΛՌͨͤΔ͔

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ґଘؔ܎ͷຊ࣭ΛݟۃΊΔ w $IFDLFSͱ.BUSJYͷຊ࣭తͳؔ܎ɺ໾ׂΛߟ͑Δ  $IFDLFS͸ɺ࠷௿ݶԿ͕͋Ε͹੹຿ΛՌͨͤΔ͔ w $IFDLFS͸ɺݸͷ਺ࣈΛड͚औΕ͹ɺͦΕ͕0,͔/(͔Λ൑ఆͰ͖ Δ

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ґଘؔ܎ͷຊ࣭ΛݟۃΊΔ w $IFDLFSͱ.BUSJYͷຊ࣭తͳؔ܎ɺ໾ׂΛߟ͑Δ  $IFDLFS͸ɺ࠷௿ݶԿ͕͋Ε͹੹຿ΛՌͨͤΔ͔ w $IFDLFS͸ɺݸͷ਺ࣈΛड͚औΕ͹ɺͦΕ͕0,͔/(͔Λ൑ఆͰ͖ Δ w ݸͷ਺ࣈͷ഑ஔ͸ɺ൑ఆʹ͸ؔ܎͕ͳ͍

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$IFDLFS͸਺ࣈͷྻ͚ͩΛѻ͏ ਺ࣈͷίϨΫγϣϯ ਺ࣈͷίϨΫγϣϯ ͕ਖ਼ղ͔Ͳ͏͔ νΣοΫ

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਺ࣈͷྻͷੜ੒͸ΞμϓλʔͰٵऩ͢Δ .BUSJYͷσʔλΛ ਺ࣈͷίϨΫγϣϯ ʢͷ഑ྻʣ ΁ม׵

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਺ࣈͷྻͷੜ੒ίʔυ ʢ$IFDLFSͷதʹ͋ͬ ͨϧʔϓʹ૬౰ʣ

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վળલͷ$IFDLFSͱൺֱ

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ڱ͍ൣғ΁ந৅Խ ந৅౓౷Ұ .BUSJYΛѻ͏ $IFDLFS /VNCFS$PMMFDUJPO Λѻ͏$IFDLFS .BUSJYશମ ਺ࣈͷྻ

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6.- $IFDLFS͸.BUSJY͔Β੾Γ཭͞Εͨ

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ந৅ԽͷԸܙ w $IFDLFSΫϥεͷίʔυ͕ݮͬͨ w $IFDLFSΫϥεͷґଘର৅͕খ͘͞ͳͬͨ

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·ͱΊ

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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠

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ࢀߟ w 4ɾ*ɾϋϠΧϫʰࢥߟͱߦಈʹ͓͚Δݴޠʱݪॻୈ࢛൛ؠ೾ॻళ

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ந৅ԽτϨʔχϯά

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ந৅ԽτϨʔχϯά w ຊ࣭Λൃݟ͢ΔεΩϧΛຏ͘ʹ͸ʁ

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ந৅ԽτϨʔχϯά w ຊ࣭Λൃݟ͢ΔεΩϧΛຏ͘ʹ͸ʁ w ਺ֶ

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ந৅ԽτϨʔχϯά w ຊ࣭Λൃݟ͢ΔεΩϧΛຏ͘ʹ͸ʁ w ਺ֶ w ࿦ཧֶ

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ந৅ԽτϨʔχϯά w ຊ࣭Λൃݟ͢ΔεΩϧΛຏ͘ʹ͸ʁ w ਺ֶ w ࿦ཧֶ w ΞϧΰϦζϜ