Norman Albers Posted July 15, 2006 Share Posted July 15, 2006 [math][ik,m] = \tfrac{1}{2}(\frac{\partial g_{im}}{\partial x^k}+\frac{\partial g_{km}}{\partial x^i} - \frac{\partial g_{ik}}{\partial x^m})[/math], and [math]\{^m_{ik}\} = g^{mn}[ik,n][/math]. This took quite a while to learn to compose, yes!!! How satisfying to speak the same language. Party at the TOWER. Link to comment Share on other sites More sharing options...
xoxpe Posted September 28, 2006 Share Posted September 28, 2006 i like F=ma because it's simple... unlike the others.. btw, i am a newbie here, nice to meet u all in this forum Link to comment Share on other sites More sharing options...
woelen Posted September 28, 2006 Share Posted September 28, 2006 cos(pi/5) = ¼ + ¼*√5 I like this one most, because I derived it myself as highschool boy, long before I ever had heard of group theory, Galois theory etc. At school we only had to learn cos(pi), cos(pi/2), cos(pi/3), cos(pi/4) and cos(pi/6) as special values. It was very striking to me that cos(pi/5) also has a special value. Link to comment Share on other sites More sharing options...
YT2095 Posted September 28, 2006 Share Posted September 28, 2006 I like: HIO4 + flat raised base = Periodic Table Link to comment Share on other sites More sharing options...
BigMoosie Posted October 5, 2006 Share Posted October 5, 2006 Number of ways to pick k items from n choices. I like it because I solved it myself before I was studying probability, only to learn that Pascal beat me by several hundred years. [math]^nC_k = \frac{n!}{(n-k)!k!}[/math] Link to comment Share on other sites More sharing options...
Sequence Posted November 5, 2006 Share Posted November 5, 2006 y=mx+b slope intercept form of an equation. Don't know why I like it. Link to comment Share on other sites More sharing options...
Gilded Posted November 7, 2006 Share Posted November 7, 2006 I like mostly because I haven't got the slightest what it's all about. It has something to do with Yukawa interaction between a scalar and a Majorana field. Link to comment Share on other sites More sharing options...
Sayonara Posted November 7, 2006 Share Posted November 7, 2006 It has something to do with Yukawa interaction between a scalar and a Majorana field. Marijuana field more like Link to comment Share on other sites More sharing options...
Guest Veritas Posted November 9, 2006 Share Posted November 9, 2006 I have to say my personal favourite is Newton's second law of motion: F=ma. Why? It's simple, sleak and the only one I can remember without thinking for a second. But of course, the three main kinematic relations: v=u+at s=ut+0.5at² v²=u²+2as and obviously their angular brothers which I don't know how to write the symbols for on the computer. Derek. Link to comment Share on other sites More sharing options...
Eureko Posted December 1, 2007 Share Posted December 1, 2007 I voted for this (integ(uv) = uv - integ(v du))one cause in Spanish (I am Spaniard) we memorice it with a funny phrase: S(uv) = uv-S(v du). S(uv) = Un Viejo-Salido(Viola Dos Universitarias). And this means: A green old man raped two universitarian girls. Funny? Link to comment Share on other sites More sharing options...
Fred56 Posted December 2, 2007 Share Posted December 2, 2007 I like Lagrange (and Laplace) transforms, they're pretty cool. Or this: [math]1... (H=\sum_i \Delta_i X_i)[/math] [math]2... H=\sum_i (\Delta_i X_i + h_i Z_i) +\sum_{ij} J_ij Z_i Z_j[/math] [math]3... H=\sum_i h_i Z_i +\sum_{ij} J_ij Z_i Z_j[/math] [math]4... E=\sum_i h_i s_i +\sum_{ij} J_ij s_i s_j[/math] ..which defines a quantum 'process', apparently (and the ordering is crucial). But I only have an idea what it all means (X and Z are the Pauli matrices, at least I know what a matrix is)... Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now