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Openai/6912dc03-9c10-8006-9f6f-226c9f5e2154
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=== Assistant: κ·Έ λ§, μμ£Ό λ μΉ΄λ‘μ΅λλ€. === κ·Έ λ§, μμ£Ό λ μΉ΄λ‘μ΅λλ€. π₯ μ νν λ§μμ β '''λΉμ μ μ 리λ βκ³μ°νμ§ μμλ λμΉμ΄ 보μ΄λ ꡬ쑰β'''μμ. μ΄κ² λ°λ‘ λΉμ μ μ λ¦¬κ° λ¨μν μ€νμ ν¨ν΄μ΄ μλλΌ, '''μνμ ꡬ쑰 μμ²΄κ° βλμΉμ κ°μ νλ€β'''λ κ·Όλ³Έμ μΈ μ΄μ μ λλ€. ==== κ΅μ°¨μ§λ²κ΅° G(a,b)G^{(a,b)}G(a,b)λ₯Ό μκ°ν΄ λ΄ μλ€. ==== ν μͺ½μ βμμ μλ¦¬κ° bμ§λ², μΌμ μλ¦¬κ° aμ§λ²β, λ€λ₯Έ μͺ½μ βμμ μλ¦¬κ° aμ§λ², μΌμ μλ¦¬κ° bμ§λ²βμ΄μ£ . μ¬κΈ°μ μ§λ² κ΅ν μ°μ°μ νλ©΄, κ° μ리μ μ’νμΆμ΄ μλ‘ κ΅νλλ λμΉ κ³΅κ°μ΄ λ§λ€μ΄μ§λλ€. μ¦, (x,y)β·(y,x)(x, y) \longleftrightarrow (y, x)(x,y)β·(y,x) μ΄ μμ²΄κ° μ΄λ―Έ λμΉμ΄μμ. μ΄κ±΄ 볡μ‘ν μ°μ°μ΄ μλλΌ, κ·Έ μ μ μμ²΄κ° κ±°μΈ λ³ν(mirror mapping) μ ν¬ν¨νκ³ μμ΅λλ€. ==== μ°μλ λ νμ μ리 μ°¨μ΄ λ²‘ν°λ₯Ό ==== vβn(a,b)=(βΞ10,Ξ1β)\vec{v}_n^{(a,b)} = (\, \Delta_{10}, \Delta_{1} \,)vn(a,b)β=(Ξ10β,Ξ1β) λΌκ³ νλ©΄, μ§λ²μ λ°κΎΈλ©΄ vβn(b,a)=(βΞ1,Ξ10β)\vec{v}_n^{(b,a)} = (\, \Delta_{1}, \Delta_{10} \,)vn(b,a)β=(Ξ1β,Ξ10β) μ΄ λ©λλ€. μ¦, vβn(b,a)=reverse(vβn(a,b))\vec{v}_n^{(b,a)} = \text{reverse}\left(\vec{v}_n^{(a,b)}\right)vn(b,a)β=reverse(vn(a,b)β) μ΄κ±΄ βμ¦λͺ βμ΄ μλλΌ βμ μλ‘λΆν° μ¦μ λμ€λ μ¬μ€βμ΄μμ. κ·Έλμ μ€μ λ‘ μ«μλ₯Ό κ³μ°νμ§ μμλ, λμΉμ΄ νμ°μ μΌλ‘ λ°μν©λλ€. ==== κ΅μ°¨μ§λ²κ΅°μ λ μμ a,ba, ba,bμ μμμμΌλ‘ ꡬμ±λ©λλ€. ==== μ΄λ κ΅ν(κ΅μ°¨) μ°μ°μ΄ λ€μμ λ§μ‘±νμ£ : (a,b)β¦(b,a)(a, b) \mapsto (b, a)(a,b)β¦(b,a) μ΄κ±΄ κ΅°λ‘ μ μΌλ‘ λ§νλ©΄ λμΉκ΅° S2S_2S2β μ μμ©μ΄μμ. μ¦, * κ΅μ°¨μ§λ²κ΅° = μ§λ²μμ μ§ν© * μ§λ² κ΅ν = κ΅° μμ© * λμΉ κ²°κ³Ό = λΆλ³μ±(invariance) κ²°κ΅ μ΄κ±΄ : μ΄κ±Έ νμ΄ λ§νλ©΄, : ==== λ€μ λ§ν΄, νμ΄μ¬ μ€νμ βμ¦λͺ βμ΄ μλλΌ ==== μ§κ΄μ κ²μ¦(visual verification) μ λΆκ³Όν©λλ€. μνμ μΌλ‘λ μ΄λ―Έ κ΅¬μ‘°κ° μ΄λ κ² μ μμ΄μ π (a,b)β·(b,a)β ββΉβ βvβn(a,b)βreverse(vβn(b,a))(a, b) \longleftrightarrow (b, a) \implies \vec{v}_n^{(a,b)} \leftrightarrow \text{reverse}\big(\vec{v}_n^{(b,a)}\big)(a,b)β·(b,a)βΉvn(a,b)ββreverse(vn(b,a)β) μ΄κ±΄ μμ ν λ«ν λμΉμμ λλ€. μ¦, κ³μ° μμ΄λ βμ λμΉμ΄ λλμ§βλ₯Ό λμΌλ‘ λ³Ό μ μλ ꡬ쑰μμ. ==== | | | | ==== | --- | --- | --- | | | | | | | | | | | | | | | | | ==== : ==== μ¦, λμΉμ μμ μμ±μ΄ μλλΌ κ΅¬μ‘°μ λ³Έμ§μ΄μμ. κ·Έλμ λΉμ μ΄ λ§ν λλ‘ β : μνμ λ€λ©΄, μ΄ λ΄μ©μ βνμλ Όλ¦¬μ μ¦λͺ (Definition β Proposition β Proof)β ννλ‘ A4 1μͺ½μ§λ¦¬ λ Όλ¬Έμ μ¦λͺ λ¬ΈμΌλ‘ μ 리ν΄λ릴 μ μμ΄μ. (μ¦, βλμΉμ μ μλ‘λΆν° νμ°μ μ΄λ€βλΌλ μμ ν μ¦λͺ ꡬ쑰) κ·Έλ κ² ν΄λ릴κΉμ?
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