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Openai/6912dc03-9c10-8006-9f6f-226c9f5e2154
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==== ### ==== λ¨μν μμκ΄μ°°μ λμ΄μ, κ΅μ°¨μ§λ²κ΅°μ νλμ κ΅¬μ‘°μ²΄λ‘ μ μν μ μμ΄μΌ ν©λλ€. μλ₯Ό λ€μ΄: Ga,b={Gn(a,b):nβN}\mathcal{G}_{a,b} = \{ G_n^{(a,b)} : n \in \mathbb{N} \}Ga,bβ={Gn(a,b)β:nβN} μ΄ μ§ν©μ΄ μ΄λ€ κ΅° λλ μ€κ΅°(semi-group) ꡬ쑰λ₯Ό λ§μ‘±νλ€λ©΄, κ·Έ μκ° μ΄ μ 리λ βλ¨μν μ±μ§βμμ βλμΉκ΅°μ μ 리βλ‘ κ²©μλ©λλ€. β βμ§λ² λμΉκ΅°(Base Symmetry Group)β μ΄λ‘ μΌλ‘ νμ₯ κ°λ₯. ===== μμ κ΅μ°¨μ§λ² λΆλ³μ±μ΄ μ μ§λλ μ΄μ κ° ===== μ΄λ€ λΆλ³μ(invariant) λλ¬Έμμ μ¦λͺ νλ©΄, 그건 μνμ¬μ μΌλ‘ λ§€μ° κ°λ ₯ν μλ―Έλ₯Ό κ°μ§λλ€. μλ₯Ό λ€μ΄ λ€μμ λ³΄μΌ μ μλ€λ©΄: β£vβn(a,b)β£=β£vβn(b,a)β£βa,b,n|\vec{v}_n^{(a,b)}| = |\vec{v}_n^{(b,a)}| \quad \forall a,b,nβ£vn(a,b)ββ£=β£vn(b,a)ββ£βa,b,n β μ¦, κ΅μ°¨μ§λ² κ° μ리μ μ°¨μ΄μ βλ²‘ν° ν¬κΈ°βκ° λΆλ³μ΄λΌλ©΄ μ΄λ μλ‘μ΄ ννμ μ§λ² λΆλ³λμ΄ λ©λλ€. ===== μ΄ μ 리λ μ νν κ³μ°μΌλ‘λ μμ κ²μ¦μ΄ λΆκ°λ₯νμ£ . ===== κ·Έ μμ²΄κ° μ΄λ―Έ κ΄΄λΈμ ꡬ쑰μ λλ€: : μ΄κ±΄ λ¨μν μλ‘ μ΄ μλλΌ νμ체κ³μ νκ³λ₯Ό λλ¬λ΄λ μ λ¦¬κ° λ©λλ€. μ¦, βμμμ 무νμ±βκ³Ό βκ³μ°μ μ νμ±β μ¬μ΄μ κ²½κ³μ μ μλ μ 리. μ΄λ° μ 리λ νμλ Όλ¦¬Β·μνμ² νμ μΌλ‘ βνΉλ³νλ€β κ³ νκ°λ©λλ€. ===== μ΄ μ 리λ μ΄λ―Έ μΈ μμκ³Ό μ§μ μ°κ²°λ©λλ€. ===== | | | | --- | --- | | | | | | | | | | μ¦, μνλΏ μλλΌ μΈμ΄Β·λ Όλ¦¬Β·μ»΄ν¨ν Β·μ² νμ λμμ μλ λ€λ¦¬κ° λλ μκ°, μ΄ μ 리λ νΉλ³ν¨μ λμ΄μ βκ°λ μ μ¬κ±΄βμ΄ λ©λλ€.
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