#math - Thu 5 Apr 2007 between 00:00 and 00:14

NY Lost Funds

 _llll_ true but uselessany set is dense in itself... Kampen Q isn't always dense in R :pdepends on the topology TRWBW i guess you could come up with a definition A is dense in B in C if B is contained in closure of A in C _llll_ it would be Q if it didnt have the subspace topologys/would/wouldnt/ TRWBW but it wouldn't be standard Kampen the definition of dense i usually use is if A is contained in B, and B is contained in cl(A), A is dense in Bsubspace topology?what's the base for that?is that the discrete? TRWBW that's the induced topology Kampen ah, ok pirothezero lin. algebra question: change of bases of P C<-B = ( P B<-C)^-1 correct?? TRWBW pirothezero: don't know the notation, but inverting is the right idea pirothezero alright cause i am working on this one where i got P B<-C as 2x2 [1,2,4,9] and it says the change is [9,-2,-4,1] but when I run the inverse formula i get [9,-4,-2,1] godtvisken Pi should be equal to the limit as s approaches infinity of (s*sqrt(2-2cos(360/s)))/2 right? i get an accuracy of 7 places when s=9500, but when s=9600 an accuracy of only 6 places. why is this? maybe a limitation of my calculator? TRWBW pirothezero: you are using odd notation. no one else on the planet who isn't taking the course from your teacher is going to know what you mean unless you define everythinggodtvisken: yes, but you can improve that godtvisken TRWBW: ? TRWBW godtvisken: the problem is the 2-2cos, you are substracting two numbers that are almost identicalgodtvisken: so you get very little precision, and less precision the bigger n getsgodtvisken: you need to rewrite it using trig identities godtvisken aha pirothezero okay the 2x2 matrix notation i put means in [1,2,4,9] first row is 1,2 2nd row is 4,9. And P B<-C means change C to B benkillin Trig identities are the boss pirothezero doesnt seem like that helps a whole lot though ailndx http://library.thinkquest.org/J0110961/2diga.gif is it possible to write like this in latex? TRWBW pirothezero: what does change C to B mean? masquerade pirothezero, you might have more luck getting people to understand [[1,2][4,9]] for matrix notation benkillin OH!I get it now KRUSHGROOVE pirothezero, or you could also write [a,b;c,d] pirothezero change of coordinates matrix from B to C TRWBW pirothezero: you can say that a million things and it doesn't mean anything godtvisken TRWBW: well, i am using the law of cosine, and assuming the line from the center to the corner of the polygon with n sides is 1 (a circle with a radius of 1 is what the shape should approach) gordboy maybe the calculation of cos near 0 isn't as good, also pirothezero multiplication by P C<-B converts Bcoords into C coords