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討論串[代數] Hungerford代數上的習題
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YES. Let X={x_1,...,x_n} be a set of generators of G.. Consider F(X) and the natural map f:F(X)-> G. Apply the theorem. to ker f. Here F(X) is the fre
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2. 我不知道這樣寫能不能理解 .... Consider the adjunction (F, G, \phi) between the category Set of sets and. the category Ab of abelian groups where FX is the free
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先述說一個定理. Thm. If F is a free abelian group of finite rank n and G is a nonzero subgroup of F. then there exists a basis {x(1),...,x(n)} of F,an intege
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