Timeline for Group rings of infinite products of groups
Current License: CC BY-SA 2.5
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 20, 2011 at 7:14 | answer | added | Chi-Keung Ng | timeline score: 0 | |
| Dec 15, 2011 at 5:59 | answer | added | Chi-Keung Ng | timeline score: 0 | |
| Nov 22, 2010 at 15:19 | comment | added | HenrikRüping | let all groups be trivial and let $R$ be the rationals. Then $2\otimes 2\otimes 2...$ is not in the image, which is generated by $1\otimes 1\otimes ...$ and these two elements are linear independent: Consider the multilinear form $f(x_1,....):=\prod x_i$, if almost all $x_i$ are $1$,$0$ otherwise. | |
| Nov 22, 2010 at 15:17 | answer | added | Todd Trimble | timeline score: 1 | |
| Nov 22, 2010 at 15:05 | comment | added | Thomas Nikolaus | How do we see that the product to the infinite tensor product is not surjective (or better say bijective)? | |
| Nov 22, 2010 at 14:37 | comment | added | Martin Brandenburg | (See mathoverflow.net/questions/11767/infinite-tensor-products for what Henrik means by the infinite tensor product here. There $g_1 \otimes g_2 \otimes ...$ makes sense, in contrast to the usual infinite tensor product of algebras.) | |
| Nov 22, 2010 at 13:56 | history | asked | HenrikRüping | CC BY-SA 2.5 |