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visits member for 1 year, 6 months
seen Mar 14 '13 at 13:57

Dec
3
revised Complex solutions of $\sin z = i \alpha \cos z$
explained the particular solution
Nov
18
revised In terms of complexity, is there a quicker way of checking if a matrix is nonsingular than computing the determinant?
added 919 characters in body
Nov
15
revised Where does the Chi-square equation come from?
added 480 characters in body
Nov
15
revised Where does the Chi-square equation come from?
added 480 characters in body
Nov
15
revised Finding coefficients of quadratic given one tangent and point on the curve
added 389 characters in body
Nov
15
revised What is degree of freedom in statistics?
added 11 characters in body
Nov
14
revised Example of a general random variable with finite mean but infinite variance
clarified the answer..
Nov
13
revised chi-square distribution: determining the constants c and d
latexified
Nov
11
revised How can I use residue theory to verify this integral formula?
edited tags
Nov
9
revised Normal Approximation to find probability of stopping at a red light at least 15 times
added 328 characters in body, adrrectionded concept of conyinuity co
Nov
2
revised Connectedness of the boundary
edited tags
Oct
13
revised Triangle problem
edited tags
Oct
13
revised An example of the maximum of $f(x)$ and the maximum of $g(x)$ does not to equal to the maximum of $(f+g)(x)$
clarified a question in comments
Oct
13
revised Let $m \in \mathbb Z, m>1$, then $\cos(2 \pi/m) \in \mathbb Q$ if and only if $m \in \{1,2,3,4,6\}$.
corrected some errors,improved formatting
Oct
13
revised Let $m \in \mathbb Z, m>1$, then $\cos(2 \pi/m) \in \mathbb Q$ if and only if $m \in \{1,2,3,4,6\}$.
corrected some errors
Oct
11
revised Probability mass function and conditional probabilities
added 182 characters in body
Oct
10
revised An angle $\theta$ can be trisected if and only if $4x^3-3x+\cos\theta$ is reducible over $\mathbb{Q}(\cos\theta)$
added 110 characters in body
Oct
10
revised An angle $\theta$ can be trisected if and only if $4x^3-3x+\cos\theta$ is reducible over $\mathbb{Q}(\cos\theta)$
added 309 characters in body
Oct
10
revised An angle $\theta$ can be trisected if and only if $4x^3-3x+\cos\theta$ is reducible over $\mathbb{Q}(\cos\theta)$
misinterpreted the question
Oct
8
revised Where are we using $C^1$ in this proof?
error, completely flawed argument.