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| bio | website | |
|---|---|---|
| location | Minneapolis, MN | |
| age | ||
| visits | member for | 1 year, 11 months |
| seen | 3 hours ago | |
| stats | profile views | 6,070 |
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May 17 |
comment |
Sum of square root of primes One can denote the floor function at $x$ by $\lfloor x\rfloor$, coded as \lfloor x\rfloor. That seems to prevail today. I suspect the $[x]$ notation was formerly completely standard simply because typesetters didn't have little pieces of steel in a shape appropriate for anything like the notation usually favored now. |
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May 17 |
revised |
Sum of square root of primes grammar |
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May 17 |
revised |
if $\mathbf x$ is sampled randomly from a hypercube on $R^n$, what is the probability density for $|\mathbf x| = d$ added 383 characters in body |
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May 17 |
comment |
if $\mathbf x$ is sampled randomly from a hypercube on $R^n$, what is the probability density for $|\mathbf x| = d$ Oh. OK, my answer is incomplete. Maybe I'll add more later. |
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May 17 |
answered | if $\mathbf x$ is sampled randomly from a hypercube on $R^n$, what is the probability density for $|\mathbf x| = d$ |
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May 17 |
answered | Limit of $\lim_{x \to 0}\left (x\cdot \sin\left(\dfrac{1}{x}\right)\right)$ is $0$ or $1$? |
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May 17 |
revised |
Working with subsets, as opposed to elements. edited body |
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May 17 |
comment |
Find the angle between the 2 points (50.573,-210.265) and (117.833,-80.550) One thing that should hit you right between the eyes is that the sum of these two numbers is eactly $90^\circ$. ${}\qquad{}$ |
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May 17 |
revised |
Minimizing Mean Squared Error for Exponential Function edited body |
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May 17 |
revised |
Minimizing Mean Squared Error for Exponential Function "display" and other TeX edits |
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May 17 |
revised |
System of Differential Equations proof question added 8 characters in body |
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May 16 |
revised |
Residue fields of gaussian primes \bmod |
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May 16 |
comment |
An explanation on variances @CalvinLin : In $\TeX$ you can write $1\times1$ instead of $1X1$. There's no need to use the letter $X$ like that. In a way, that's the main point of $\TeX$. |
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May 16 |
comment |
An explanation on variances They should be column vectors so that the variance and covariance are matrices. That is standard usage. |
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May 16 |
revised |
Proving $\ker(TT^* + T^*T) = \ker(T)\setminus \ker(T^*)$ added 43 characters in body |
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May 16 |
revised |
Fourier Transform of $(\operatorname{sinc}(x))^2\cdot \exp(-ax^2)$ added 15 characters in body |
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May 16 |
comment |
Which trigonometric identities involve trigonometric functions? @Daved : Hello. At first glance that looks to me like something that doesn't depend on the fact that the circle is parametrized by arc length rather than in some other way. |
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May 16 |
comment |
A matrix w/integer eigenvalues and trigonometric identity The ways in which people use TeX on this site are sometimes quite baffling. Daved: Why use a "\displaystyle" in your piecewise definition of $\Lambda_{k\ell}$ instead of an actual display, and why use the \mbox{} construction in "cases" instead of alignment tabs? (I altered both and did some other TeX improvements.) |
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May 16 |
revised |
A matrix w/integer eigenvalues and trigonometric identity added 17 characters in body |
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May 16 |
comment |
Do lay persons really believe that all of mathematics is known? People in the field of math education might have an interest in actually doing the work to conduct a good survey and in analyzing the results, but they won't know what questions to ask without a lot of really good input from mathematicians. This has to be a collaboration. |
