7:34 AM
@quid I don't know why (probability) and (expected-value) are syn, but both are possible solutions. I personally prefer the later though. — GNU Supporter 13 hours ago
I don't understand that synonym either; maybe it made sense when the site was small. — quid ♦ 13 hours ago
When I look at the list of synonyms, it seems that this was created by Willie Wong in September 2011.
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The tag expected-value was recently created. We used to have an expectation tag, but we decided that it was sufficiently covered by probability, and so expectation was merged into probability several months back. In keeping with this decision, I think expected-value should also be merged with p...
I just looked at the questions tagged with (expected-value). It appears to me that a couple of them perhaps should be tagged (probability-theory) instead of (probability). What do you think? — Willie Wong Sep 19 '11 at 18:18
Should we perhaps ping Willie Wong (as the creator of the synonym) - in case he has something to add to the recent discussion?
1 hour later…
8:45 AM
specific-question I would be tempted to add set-theory and cardinals to this question: Can there be an Aleph Two or even greater? But I see that Andrés E. Caicedo, who takes care of set-theory related tags, posted an answer there and did not change the tag, so I am less sure.
Is it possible that adding such tags would change the perception of the question as far as the OP's knowledge level and intentions are concerned?
6 hours later…
3:09 PM
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For a system of two differential equations, the eigenvalues determine the stability of the system. When the eigenvalues are positive, the system is unstable. In case of complex eigenvalues, the system is unstable when the real parts of the eigenvalues are positive. In the latter case, how do we m...
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