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2h
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 :)
16h
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.
16h
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.
16h
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
Oct
2
revised Reordering matrix multiplication around diag operator
added 72 characters in body
Oct
2
revised Reordering matrix multiplication around diag operator
added 472 characters in body
Oct
2
answered Finding $E(X \mid X > Y )$ when $X, Y \sim N(0,1)$
Oct
2
revised Reordering matrix multiplication around diag operator
deleted 18 characters in body
Oct
2
asked Reordering matrix multiplication around diag operator