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Aug
27
awarded  Favorite Question
Aug
27
awarded  Yearling
Aug
21
revised What is the $d\sigma/\sigma$ rule?
bad link
Aug
14
awarded  Notable Question
Aug
4
accepted Why does the surface area of the hypersphere go to zero as the number of dimensions goes to infinity?
Aug
3
comment Why does the surface area of the hypersphere go to zero as the number of dimensions goes to infinity?
@HansLundmark Yeah, you were right :)
Aug
3
comment Why does the surface area of the hypersphere go to zero as the number of dimensions goes to infinity?
@joriki: Ah, I see now, thanks.
Aug
3
comment Why does the surface area of the hypersphere go to zero as the number of dimensions goes to infinity?
@joriki They're all "areas"? If I have a square in two dimensions and I rotate it so that it's now embedded in three or four or five dimensions, its area is unchanged.
Aug
3
asked Why does the surface area of the hypersphere go to zero as the number of dimensions goes to infinity?
Jun
2
revised Intuitive explanation of a definition of the Fisher information
Fix definition of score.
Jun
2
comment Intuitive explanation of a definition of the Fisher information
@bcf: You're right. And yeah, it is a really well-written answer. All the more reason to remove minor mistakes :)
Jun
2
suggested approved edit on Intuitive explanation of a definition of the Fisher information
Jun
2
comment Intuitive explanation of a definition of the Fisher information
@bcf no that doesn't make sense either. I'm going to edit it.
Apr
15
awarded  Notable Question
Dec
8
awarded  Caucus
Dec
7
awarded  Nice Question
Oct
31
comment Computing Gradient and Hessian of a vector function
@SeeBees: Take a look at Pearlmutter and Schraudolph's work on the R technique that approximates exactly that in linear time.
Oct
16
awarded  Civic Duty
Oct
16
asked Does the diagonal of a gradient exist?
Oct
2
revised Finding $E(X \mid X > Y )$ when $X, Y \sim N(0,1)$
added 7 characters in body