Recent content by fluxions

Here's a quote of Norbert Wiener: "It is not essential for the value of an education that every idea be understood at the time of its accession. Any person with a genuine intellectual interest and a wealth of intellectual content acquires much that he only gradually comes to understand...

Has a member of the Tea Party ever been bullied so relentlessly that their only (perceived) recourse was to commit suicide? And yes, kids can be quite cruel; that is clearly not unique to kids though. I think this may be a perversion of the 'tit-for-tat' morality that a lot of people...

One can write \vec{r} = r \hat{r} . You are given that the length is always 1, so what can you conclude about r? Then note that \vec{r} \cdot \vec{r} = r \hat{r} \cdot r \hat{r} = r^2 . Insert the value of r you figured out above, and differentiate this expression with respect to time. You...

Perhaps. I haven't looked into the matter. In any case, it is evident that it is possible to be bullied for being a member of a group without publicly self-identifying as a member of that group. This is in contrast to your claim in post #36 wherein you essentially (at least this is how I...

Some kids are bullied just for being perceived as gay.

I figured it out while sleeping. The singular values of T are the eigenvalues of \sqrt{T^*T} which is a self-adjoint operator, and therefore has real eigenvalues. So s_i = \overline{s_i} for each i. The desired relation follows.

Homework Statement Let T be a linear transformation over V, a finite-dimensional complex inner product space (with inner product < , >). Suppose T has the singular value decomposition Tv = \sum_j^n s_j \left\langle v,e_j \right\rangle f_j where s_1, ... s_n are the singular values of T and...

Homework Statement A star of mass M and radius R is moving with velocity v through cloud of particles of density \rho . If all the particles that collide with the star are trapped by it, show that the mass of the star will increase at a rate \frac{dM}{dt} = \pi \rho v \left(R^2 +...

Still stuck on this problem. I can write, using the expression for x given in the link and the relation between u,v,w, and alpha x = \frac{2}{g} v^2 \sin\alpha \cos\alpha - \frac{8 \gamma}{3 g^2} v^3 \cos\alpha \sin^2\alpha Maximizing this function wrt. to v doesn't lead to the...

Then start programming and stop worrying about your IDE having pretty colors.

The standard 'introductory' book on algorithms is https://www.amazon.com/dp/0262033844/?tag=pfamazon01-20. But attempting to read that book before having some basic programming experience and sufficient mathematical sophistication is futile. When you're ready, there is an OCW based on the book...

I use IDLE, which comes with the Python distribution. It should work just fine for you while you are still learning the basics.

Here you go: http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-00-introduction-to-computer-science-and-programming-fall-2008/index.htm"

Homework Statement The problem is Kibble & Berkshire 3.8, http://books.google.com/books?id=0a8dk0eDxgEC&lpg=PP1&ots=DT80qg1JSM&dq=kibble%20berkshire&pg=PA68#v=onepage&q&f=false" is a link. (The problem is on page 68. Equation 3.17, referred to in the problem, is on page 53.) I figured out the...