Matt N.

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Fundamenta Mathematicae.

Biblioteka Wirtualna Matematyki.


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Oct
13
 comment Trying to understand $\mathbb{Q} / \mathbb{Z}$
Thank you! I'm just never sure whether what I do is right...
Oct
13
 asked Trying to understand $\mathbb{Q} / \mathbb{Z}$
Oct
13
 comment A question about the tensor product of $\mathbb{Q}$
@KCd: thank you, will do!
Oct
13
 comment A question about direct sums and products of modules
@HansLundmark: I'm glad I'm not the only one who writes stupid things.
Oct
13
 revised Superscript wedge on an $R$-module
edited body
Oct
13
 accepted Proof of $(\mathbb{Z}/m\mathbb{Z}) \otimes_\mathbb{Z} (\mathbb{Z} / n \mathbb{Z}) \cong \mathbb{Z}/ \gcd(m,n)\mathbb{Z}$
Oct
13
 comment Proof of $(\mathbb{Z}/m\mathbb{Z}) \otimes_\mathbb{Z} (\mathbb{Z} / n \mathbb{Z}) \cong \mathbb{Z}/ \gcd(m,n)\mathbb{Z}$
@ShaunAult: thanks! I'm not sure I understand why I cannot treat $1$ as a basis though... Could you tell me more please?
Oct
13
 accepted A question about the tensor product of $\mathbb{Q}$
Oct
13
 comment A question about the tensor product of $\mathbb{Q}$
So just to make sure I understand this: $a \otimes b + c \otimes d$ is also a simple tensor?
Oct
13
 asked A question about the tensor product of $\mathbb{Q}$
Oct
13
 asked Proof of $(\mathbb{Z}/m\mathbb{Z}) \otimes_\mathbb{Z} (\mathbb{Z} / n \mathbb{Z}) \cong \mathbb{Z}/ \gcd(m,n)\mathbb{Z}$
Oct
13
 accepted A question about direct sums and products of modules
Oct
13
 comment A question about direct sums and products of modules
Thank you! Of course : / And what is your answer to my question 1?
Oct
13
 asked A question about direct sums and products of modules
Oct
13
 revised Superscript wedge on an $R$-module
Typo correction.
Oct
13
 accepted Question about chains and lattices
Oct
13
 asked Question about chains and lattices
Oct
12
 answered Finding the number of newspapers
Oct
12
 revised Finding the number of newspapers
Typo correction.
Oct
11
 comment Characterisation of compact subsets of Banach spaces
@t.b.: I think every subset is equicontinuous: for any $\varepsilon$ choose $\delta := 1 / 2$ then $|x(n) - x(n^\prime)| = 0 < \varepsilon$ if $|n - n^\prime| < \delta$.
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