Apprentice Queue
Reputation
404
Top tag
Next privilege 500 Rep.
Access review queues
 Jan 20 comment find the distribution of $Z = Y\sqrt X$ Is it truly $V_1/V_2$ and $V_2$? If so then yes. Jan 19 revised Which of these two ways to take the derivative of a delta function times another function is correct? \delta(x)f'(x) not \delta'(x)f(x) Jan 19 suggested approved edit on Which of these two ways to take the derivative of a delta function times another function is correct? Jan 1 answered Finding an equation for a circle given its center and a point through which it passes Dec 31 answered In this case, does $\{x_n\}$ converge given that $\{x_{2m}\}$ and $\{x_{2m+1}\}$ converge? Sep 13 awarded Commentator Sep 13 comment Is there any math operation defined to obtain vector $[4,3,2,1]$ from $[1,2,3,4]$? It's the called the reverse identity matrix J. J[1 2 3 4]^T = [4 3 2 1]^T. Sep 10 answered What function is this? Jul 21 comment Help with a derivative Just do it the normal way; or take the log of your expression and calculate its derivative. Jul 20 comment What are the Axiom of Choice and Axiom of Determinacy? This answer is at the wrong level and self-indulgent. And honestly probably doesn't help the original poster. Jun 18 comment Good textbooks on combinatorics for self-study I would not classify this book as introductory at all. Apr 20 awarded Editor Apr 20 revised Transformations of Normal added 47 characters in body Apr 20 answered Transformations of Normal Apr 14 comment Algorithmic Complexity of Iterated Sums I don't think so. Let f(a,n) := {if (n>1) n*f(a,n-1) else 1} = n!. Then f(a,n) is a polynomial-time algorithm using simple operations but F(n) is not a polynomial-time algorithm. Mar 16 awarded Critic Mar 16 comment Recommend a statistics fundamentals book If you just want a review, just read Schaum's Outline of Probability and Statistics. It's less than $16 new. Mar 5 comment Explain$-\int^{a}_{b}\frac{Q}{4 \pi \epsilon \bar{r}^{2}} \cdot d \bar{r}= \left[\frac{Q}{4\pi \epsilon \bar{r}}\right]^{a}_{b}$In American textbooks, curl is usually written$\nabla \times\$. Mar 5 answered More help with implicit differentiation Mar 2 comment Line simplification algorithm Is the shape important or is only the frequency of the teeth important? If only the frequency of the teeth, you can use a color gradient instead. You have 5000 points but only 450 pixels, then split the line into fixed number intervals (each with 30 points for example) and calculate how many teeth there are in each interval. Then color code with red for very few teeth and blue for very many teeth.