Timeline for Are submodules of free modules free?
Current License: CC BY-SA 2.5
4 events
| when toggle format | what | by | license | comment | |
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| Sep 22 at 20:02 | comment | added | Z Wu | For the first statement, we need to assume $1\neq 0$ in $A$. Otherwise (i) and (ii) are trivially true and (iii) is false because an integral domain is nonzero by definition. | |
| Mar 9, 2016 at 8:48 | comment | added | ACL | See Martin's answer there (a reference to Lam's book on modules and rings): math.stackexchange.com/questions/400776/… | |
| Jan 30, 2011 at 15:39 | comment | added | Joy-Joy | @Konstantin Ardakov: You are right. Thanks a lot for the detailed explaination! | |
| Dec 29, 2010 at 0:08 | history | answered | Joy-Joy | CC BY-SA 2.5 |