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Paul Gilmartin

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84 reputation
 bio website visits member for 8 months
13 badges
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4 Questions

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7
 Let $G$ be any abelian group and $a\in{G}$. Show there exists a homomorphism $f:G\rightarrow{\mathbb{Q}/\mathbb{Z}}$ such that $f(a)\neq{0}$.
4
 Computing $\operatorname{Ext}^{1}_{\mathbb{Z}}(\mathbb{Q},\mathbb{Z})$
2
 Is the tensor product of two torsion-free modules always non-zero?
2
 Global dimension of quasi Frobenius ring

84 Reputation

+5 Computing $\operatorname{Ext}^{1}_{\mathbb{Z}}(\mathbb{Q},\mathbb{Z})$
+10 Is the tensor product of two torsion-free modules always non-zero?
+10 Global dimension of quasi Frobenius ring
+5 Let $G$ be any abelian group and $a\in{G}$. Show there exists a homomorphism $f:G\rightarrow{\mathbb{Q}/\mathbb{Z}}$ such that $f(a)\neq{0}$.
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homological-algebra × 4
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ring-theory
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abstract-algebra × 2
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tensor-products

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Mathematics Stack Exchange Mathematics 84 rep 13

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