« first day (2905 days earlier)      last day (1429 days later) » 

Martin Sleziak
Martin Sleziak
7:57 AM
@MartinSleziak Two more questions in this tag.
0
Q: Compute E(X), Var(X), E(z), Var(Z) given mean and covariance of a random vector

Seve MartinezI've been trying to wrap my head around this problem for several days and still have no real direction on how to proceed. I've been looking up how to handle linear transformations but I still don't understand how I could get the values for x,y, and z using the below information. Thank you for any...

linear-algebra multivariate-distributions
0
Q: Determining independence of random variables given mean and covariance

Seve MartinezI've seen several examples of determining independence (or dependence) of vectors when there is a supplied observed value. However, when simply given a mean and covariance matrix, I have no idea how to proceed. Any direction is greatly appreciated. Let X be drawn from a 3-dimensional normal dist...

linear-algebra multivariate-distributions
The above queries did not return older occurrences of this tag.
 
 
1 hour later…
Martin Sleziak
Martin Sleziak
9:08 AM
tag-wikis A tag-info for trace-map was created.
> Questions about the trace map on Sobolev spaces, which maps a function on a domain to its boundary values, and generalizations or related concepts. Consider using [sobolev-spaces] as well. For questions about the trace of a matrix or an operator, please use [trace] instead.
10
Q: Should the PDE notion of trace be tagged with the 'trace' tag?

Calvin KhorIs the trace tag supposed to be used for questions about the trace operator from Sobolev theory (analysis)? I was going to de-tag "trace" from a question, but it seems like it's not the first time this happened, Trace Theorem: a question about Evans' proof A question about a detail in the proo...

discussion tagging
Another unrelated use of the word, knot traces, is a hot topic recently. I'm in favor of using distinct tags for such widely separated topics, and will supply tag information for trace-map. — hardmath May 22 at 19:05
 

« first day (2905 days earlier)      last day (1429 days later) »