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Coqの紹介 #w8lt
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Shohei Yasutake
July 29, 2015
Programming
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350
Coqの紹介 #w8lt
w8ltでCoqの紹介をしました
Shohei Yasutake
July 29, 2015
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Transcript
Coqͷհ W8LT @amutake_s
Coq • ఆཧূ໌ࢧԉܥͷͻͱͭ • ֶతͳ໋ͷূ໌ɾϓϩάϥϜͷ࣋ͭੑ࣭ ͷূ໌ͳͲʹ͑Δ
ఆཧূ໌ࢧԉܥ • ਓ͕ؒূ໌Λॻ͘ͷΛखॿ͚ͯ͘͠ΕΔ • ݱࡏͷূ໌ͷঢ়ଶɺԿΛࣔ͞ͳ͚Ε͍͚ͳ͍ͷ͔ɺ ͳͲͳͲΛදࣔͯ͘͠ΕΔ • ͪΐͬͱ͚ͩࣗಈূ໌ • ਖ਼͍͠ূ໌͔Ͳ͏͔ΛνΣοΫͯ͘͠ΕΔ
• ࢴͷ্ͷূ໌ͩͱຊʹਖ਼͍͠ͷ͔Θ͔Βͳ͍͜ͱ ͋Δ
ఆཧূ໌ࢧԉܥͷॏཁੑ • ʮͦͷূ໌ຊʹਖ਼͍͠ͷʁʯʮͦͷϓϩάϥϜຊʹ όάͳ͍ͷʁʯ • ࠷ۙͰɺग़ͯ͘ΔఆཧΛࢴ্Ͱͳ͘ఆཧূ໌ࢧԉܥ Λͬͯܗࣜతʹূ໌͍ͯ͠Δจ͕૿͖͍͑ͯͯΔ • ఆཧূ໌ࢧԉܥͷ͕ࣝڭཆʹͳΔͱ͖͕དྷΔ͔ •
จ͡Όͳ͍͖ͯ͘ͳΓূ໌Λ͚͛ͭΒΕΔ͜ͱ ͕͋ΔΒ͍͠… https://twitter.com/xuwei_k/status/409797442284969984
ఆཧূ໌ࢧԉܥ (Coq) ͷ࣮ྫ • CompCert • CoqͰॻ͔ΕͨCίϯύΠϥɻ࠷దԽͷաఔͰϓϩάϥϜͷҙຯΛม͑ͳ͍͜ͱͷূ໌ͳ Ͳ • ࢛৭ఆཧ
• ༗໊ͳఆཧɻCoqʹΑΔূ໌Ҏલʹূ໌͕͋ͬͨɺෳࡶ͗ͯ͢ຊʹਖ਼͍͔͠Ͳ͏ ͔Θ͔Βͳ͔ͬͨ • Verdi • ࠷ۙಡΜͰ͍͢͝ͱࢥͬͨࢄγεςϜ༻ͷCoqͷϑϨʔϜϫʔΫ (PLDI2015) • Coq্Ͱॻ͍ͨোੑ͕ͳ͍ࢄγεςϜͷίʔυΛɺ͋Δোʹରͯ͠ੑ͕͋Δ ͷʹมͯ͘͠ΕΔ (มޙͷϓϩάϥϜ͕োੑΛ࣋ͭ͜ͱূ໌ࡁΈ)ɻ࣮ߦՄೳ
Coqͷ͍ํ (งғؾ͚ͩ) • ϥΠϒূ໌͠·͢
Ͳ͏ͯ͠ূ໌͕Ͱ͖Δͷʁ • ΧϦʔϋϫʔυಉܕରԠʹجͮ͘ • ໋Λද͢ܕͷΛ࡞Δ͜ͱ͕Ͱ͖ΕͦΕ͕ͦ ͷ໋ͷূ໌ʹͳΔ ཧ ϓϩάϥϜ ໋1 ܕ1
໋1ͷূ໌ ܕ1ͷ ໋1㱺2 1ˠ2 ؔͷܕ ໋1a2 1 2ͷܕ ໋1a2 1 2ͷੵܕ
ূ໌߲ • Print ͨ͠ΒͣΒͣΒ Ͱͯ͘Δ͕ͭূ໌ • λΫςΟΫͷΈ߹ ΘͤʹΑΓূ໌߲͕ ࡞ΒΕΔ •
proof term ͱ͔ evidence ͱ͔ݺ Ε·͢
·ͱΊ • ఆཧূ໌ࢧԉܥʹ͍ͭͯઆ໌͠·ͨ͠ • Coqͷ͍ํʹ͍ͭͯσϞΛߦ͍·ͨ͠ • Ͳ͏ͯ͠ূ໌ͳΜͯ͜ͱ͕Ͱ͖Δ͔ʹ͍ͭͯઆ໌͠·͠ ͨ • Coqʹ͍ͭͯͳΜͱͳ͘Θ͔ͬͯΒ͑ͨΒخ͍͠Ͱ͢