Skip to main content
7 events
when toggle format what by license comment
Dec 4, 2016 at 20:56 vote accept Oliver
Dec 4, 2016 at 11:53 comment added Rodrigo de Azevedo Since $\rm x x^{\top}$ is symmetric, wouldn't it make more sense to half-vectorize instead? $\mbox{vech} (\rm x x^{\top})$ has only $\binom{n+1}{2}$ entries. One could use the duplication matrix, too.
Dec 4, 2016 at 8:27 answer added Federico Poloni timeline score: 5
Dec 4, 2016 at 8:06 comment added David Roberts I edited this so it was formatted properly, but I think you need to supply more context at the very least. Even then it's not clear this will be on-topic, but I'm not saying myself one way or the other.
Dec 4, 2016 at 8:05 review First posts
Dec 4, 2016 at 8:31
Dec 4, 2016 at 8:04 history edited David Roberts CC BY-SA 3.0
Prettified question
Dec 4, 2016 at 7:57 history asked Oliver CC BY-SA 3.0