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klipt
3196 days ago
Uppercase sigma is used for multivariate distributions:
https://en.wikipedia.org/wiki/Multivariate_normal_distributi...
1 comments
pps43
3196 days ago
But this is not common. If you don't know what uppercase sigma refers to, sum is a much better guess than standard deviation of multivatiate normal distribution.
In this case google is probably simply case insensitive.
link
In this case google is probably simply case insensitive.