User talk:Langmore

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Flaw in Multivariate normal distribution
There is a flaw in this edit. It is true that the k-dimensional multivariate normal density has a factor of (2$\pi$)−k/2. However, the notation said
 * $$ \left| 2\pi \mathbf{\Sigma} \right|^{-1/2} \, $$

and $$ \left| \mathbf{A} \right| \, $$ means the determinant of the matrix A, and when you multiply the matrix by 2π, that has the effect of multplying its determinant by (2π)k. Thus 2π &Sigma; is the same as (2π)k.

I've edited so that it's in a form that is neither the way you found it nor the way you left it, and that I hope will not be as vulnerable to that particular misunderstanding. Michael Hardy (talk) 20:14, 24 November 2016 (UTC)