# Search results

1. ### Circumference of a 4-sphere

Is it just coincedence that 2∏r × ∏r2 =2∏2r3
2. ### VB Project: 20 Greatest Mathematicians

Pascal & Pythagoras?
3. ### Need some help with lim

Factorising 2X^2-X-15 gives (2X+5)(X-3) Therefore: X=3 or X=-5/2
4. ### Maximum number of possilities?

This is one of the few references I can find that may have some bearing. I think he mean's Hubble Volume.
5. ### Algebra problem

Alleluia I thought I was going mad. It's a good paper, I bet lots of people read it but I bet they rarely actually follow the math. Thanks again.
6. ### Algebra problem

Ok that PDF works it out a different way but, even now, things don't look right From the bottom of the second page We have "Now recombining the RHS and LHS we have:" 1/2 ((1/c+v)+(1/c-v))[pard]T/[pard]t = [pard]T/[pard]x +(1/c+v)([pard]T/[pard]t) Right, fine and dandy BUT...
7. ### Algebra problem

After I got c/(c^2- v^2) on left side I moved the 1/(c-v)over to isolate [pard]T/[pard]x over on the right then removed [pard]T/[pard]t from the brackets to get the fraction v/(c^2- v^2). I them moved the whole lot across to put it equal to zero
8. ### Algebra problem

Hi following a link on another thread I began to read On The Electrodynamics Of Moving Bodies should equal but I end up with a minus instead of a plus between the two fractions(in the last equation). I've gone through my calculations but I cannot see where I've gone wrong...