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Apr
14
comment How to find the n-th derivative?
@Bernard Your simplification can't be right. It doesn't work for $n=1$.
Apr
10
comment What is the mutual information $I(X;X)$?
This answer is wrong. It should be unselected. The answer by @avitus is the right one.
Apr
5
awarded  Popular Question
Mar
27
awarded  Notable Question
Mar
20
revised $3\sigma^2 \le \mu(1-\mu)$ for unimodal probability distributions on $[0,1]$?
added 273 characters in body
Mar
20
asked $3\sigma^2 \le \mu(1-\mu)$ for unimodal probability distributions on $[0,1]$?
Feb
18
comment A generalization of this type of mean to power > 2
@Macavity I think that $n,m$ generalization merits inclusion into an answer.
Feb
13
comment shadow price in linear programming
Where can I find a more mathematical explanation of this (I am a physicist, so by mathematical I don't mean too abstract)?
Jan
22
comment Why can a circle be described by an equation but not by a function?
@sashoalm Yes, and that function is called the indicator function for the set of pairs $(x,y)$ that satisfy the relation.
Dec
15
awarded  Caucus
Dec
12
comment What is the name of this letter?
This is question fits better on tex.stackexchange.com.
Nov
21
accepted Minimum dimension to hold $N$ points with given distances?
Nov
21
revised How to determine if a vector belongs to the conical hull of a set of vectors?
edited title
Nov
10
comment How to determine if a vector belongs to the conical hull of a set of vectors?
@p.s. Can you give more details please?
Nov
7
comment How to determine if a vector belongs to the conical hull of a set of vectors?
@John $0\le \alpha_i < \infty$. Yes, the infinite cone.
Nov
7
asked How to determine if a vector belongs to the conical hull of a set of vectors?
Oct
31
asked Minimum dimension to hold $N$ points with given distances?
Oct
20
comment Is the set of all invertible $n \times n$ matrices a vector space?
@JacquesUng You should accept this answer.
Oct
17
comment The Wicked Integral
I think it is very unintuitive that this is independent of $n$. It would be nice if someone offered an intuitive explanation of that fact.
Oct
9
comment Creative way to solve a linear system
Try Gaussain elimination.