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seen Apr 13 at 20:42

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I write to discover what I think.


Jan
13
comment Use the product rule, find the derivative $(x+6x^{1/2})(x-2x^{1/2}+1)$
this is your 5th question on derivatives, why don't you use $LaTeX$ formatting?
Jan
13
reviewed Leave Open probability of at least (n/2) + 1 out of n irrelevant events
Jan
12
accepted Is the matrix $R$ in the $QR$ decomposition unique?
Jan
12
comment Reference on constructing preconditions (beginner level)
Thank you for your answers and contribution, I enjoyed reading the first reference.
Jan
12
comment Reference on constructing preconditions (beginner level)
Thank you for your answer.
Jan
12
accepted Reference on constructing preconditions (beginner level)
Jan
12
comment Reference on constructing preconditions (beginner level)
Thank you for your answer, it was a bit above beginner level but thanks.
Jan
12
revised Reference on constructing preconditions (beginner level)
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Jan
12
awarded  Custodian
Jan
12
reviewed No Action Needed Given four independent random variables $X_1,\cdots,X_4$ find $Y=\min\{X_1,X_2,X_3,X_4\}$
Jan
12
revised Find the derivative ${(x^{3} + 2)(x^{2} + 2) \over x^3+1}$
added 3 characters in body; edited tags
Jan
12
revised Proof that the derivative of the prime counting function is the probability of prime?
added 19 characters in body
Jan
12
revised Find the derivative ${(x^{3} + 2)(x^{2} + 2) \over x^3+1}$
edited title
Jan
11
comment Is the matrix $R$ in the $QR$ decomposition unique?
@HagenvonEitzen: Whoa, easy peasy! But what's the role of positive diagonal elements in your proof?
Jan
11
asked Is the matrix $R$ in the $QR$ decomposition unique?
Jan
11
comment Linear algebra question on rank and null space
Thank you for the edit @Aðøbe.
Jan
11
accepted Linear algebra question on rank and null space
Jan
10
comment Linear algebra question on rank and null space
I asked about the system you wrote right after $b=b_R+b_N$, I understand the rest of it.
Jan
10
comment Linear algebra question on rank and null space
I wouldn't need the answer by that time, I neededit for my final exam.
Jan
10
comment Linear algebra question on rank and null space
Umm, no I don't understand where did you get your last system from! I see $b$ is the last column and the other columns are some multiplication of what you calculated, the basis of column space of and null space. Could you clarify? This is my last question, I promise!