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₯l‹C‹LŽ–Χέ·έΈή
ψκŠT—v
’蕝}Œ`i‚Δ‚’‚Σ‚­‚Έ‚―‚’j‚Ν€·“n‚΅‚Μ•‚ͺν‚Ιˆκ’θ‚Ζ‚Θ‚ι}Œ`‚Ε‚ ‚鑂‚܂耓]‚ͺ‚΅‚½Žž‚ɍ‚‚³‚ͺ•Ο‚ν‚η‚Θ‚’}Œ`‚Ε‚ ‚ι‘‚½‚Ύ‚΅€dS‚̍‚‚³‚Ν•Ο‚ν‚Α‚Δ‚ΰ‚’‚’‘
2ŽŸŒ³‚̕‹Ȑό‚̏ꍇ‚͒蕝‹Θό (curve of constant width)€3ŽŸŒ³‚̕‹Ȗʂ̏ꍇ‚͒蕝‹Θ–Κ (surface of constant width) ‚Ζ‚’‚€‘’蕝‹Θό‚Ι‚Ν‰~‚βΩ°Ϋ°‚Μ‘½ŠpŒ`‚Ȃǁi‚ΜŽόj€’蕝‹Θ–Κ‚Ι‚Ν‹…‚Ȃǁi‚Μ•\–ʁj‚ͺ‚ ‚ι‘
ω Žό’·‚ƖʐΟ
•‚ͺ“―‚Ά’蕝‹Θό‚ΜŽό’·‚Νˆκ’θ‚Ε‚ ‚ι‘‚·‚Θ‚ν‚Ώ€• s ‚̒蕝‹Θό‚ΜŽό’·‚Ν’ΌŒa s ‚Μ‰~Žό‚Ζ“―‚Ά ‚Ε‚ ‚ι‘‚±‚κ‚πΚήΩΛή΄ (Barbier) ‚̒藝‚ΖŒΔ‚Τ‘

•‚ͺi‚·‚Θ‚ν‚ΏŽό’·‚ͺj“―‚Ά‚Ε‚ΰ€–ΚΟ‚ΝˆΩ‚Θ‚θ‚€‚鑉~‚ΝŽό’·‚ͺ“―‚Ά}Œ`‚Μ’†‚ŖʐςͺΕ‘ε‚Θ‚Μ‚Ε€• s ‚̒蕝‹Θό‚Μ’†‚Ε‚ΰΕ‘ε‚Ε‚ ‚ι‘‚»‚̖ʐςΝ
‚Ε‚ ‚ι‘
‚»‚κ‚Ι‘Ξ‚΅€–ʐςͺΕ¬‚Θ‚Μ‚ΝΩ°Ϋ°‚ΜŽOŠpŒ`‚Ε‚ ‚ι‘‚±‚κ‚πΜήΧΌ­Ή₯ΩΝή°Έή (Blaschke-Lebesgue) ‚̒藝‚ΖŒΔ‚Τ‘‚»‚̖ʐςΝ
‚Ε€“―‚Ά•‚Μ‰~‚Μ–ΚΟ‚Μ 0.897342 ”{‚Ε‚ ‚ι‘
ω ‰ž—p
’蕝‹Θό‚Μ‰ž—p—α‚Ζ‚΅‚Δ€ΟέΞ°Ω‚ΜŠW‚ͺ‚ ‚ι‘ΟέΞ°Ω‚ΜŠW‚Μ—Ž‰Ί–hŽ~‚Μ‚½‚ί‚Ι€ŒŠ‚̍·‚΅“n‚΅‚̍ő啝‚ͺŠW‚ΜŒ`σ‚̍ŏ¬•‚ζ‚θ‚ΰ¬‚³‚­‚Θ‚ι‚ζ‚€‚Ι‚΅‚ζ‚€‚Ζ‚·‚κ‚Ξ€ˆκ”Κ‚Ι‚ΝŠW‚ΝŽΐΫ‚ΜŒŠ‚ζ‚θ‚ΰ‚©‚Θ‚θ‘ε‚«‚Ȗʐςπθ—L‚·‚ι‚±‚Ζ‚Ι‚Θ‚ι‘‚±‚±‚ΕŠW‚ΜŒ`σ‚Ζ‚΅‚Ē蕝‹Θόi‚Ω‚Ζ‚ρ‚ǂ̏ꍇ‚Ν‰~j‚πΜ—p‚·‚ι‚Ζ€ŠW‚Μ‘ε‚«‚³‚ΖŽΐΫ‚ΜŒŠ‚Μ‘ε‚«‚³‚Ζ‚π‹ί‚’‚ΰ‚Μ‚Ι‚·‚ι‚±‚Ζ‚ͺ‚Ε‚«‚ι‚½‚ί“s‡‚ͺ—Η‚’‘
ω –β‘θ“_
‰~“›‚β‹…‚πμ‚θ‚½‚’κ‡‚Ι’ΌŠ΄“I‚ΙŽv‚’‚Β‚­’2–‡‚Μ•½–Κ‚πˆκ’θ‚Μ•‚ΙΎ―Δ‚΅‚Δ€‚»‚ΜŠΤ‚Ε“]‚ͺ‚·£‚Ζ‚’‚€Žθ–@‚Ε‚Ν€‚½‚Ζ‚¦‚ΞΝή±ΨݸނȂǍ‚‚’Έ“x‚ͺ•K—v‚ȏꍇ‚Ι‚Ν–β‘θ‚ͺ‚ ‚鑉½‚η‚©‚Μ•ϋ–@‚Ε’†S‚ͺ½ήΪ‚Θ‚’‚ζ‚€‚Ι‚΅‚Θ‚―‚κ‚Ξ€^‰~‚β^‹…‚Ε‚Ν‚Θ‚­Ω°Ϋ°‚Μ‘½ŠpŒ`‚Ζ‚Θ‚ι‘
o“T:Wikipedia
2016/06/22 00:01
ωΏl‹C‹LŽ–Χέ·έΈή
2018/01/19 XV
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