1 vote

How come when changing coordinates you do the opposite rotation you want?

To answer the question about the B coordinates, $x’$ and $y’$ are the definitions of the new coordinates. The rest of the problem is then to transform $x$ and $y$ to $x’$ and $y’$ because you are ...
Jack's user avatar
  • 61
1 vote

Contradiction In Deriving Moment Of Inertia Of Disc

I think this question may look like an integration problem but it is actually a physics concept based doubt. The main problem about using a rod of length dx with one end at the centre is it does not ...
Ham Lemon's user avatar
  • 537
1 vote

Hopf fibration to rotation matrices

A number of years ago, I worked out the explicit formula for the double covering homomorphism $SU(2)\to SO(3)$. (I am sure this must be in various textbooks and papers, but I do not know a reference.) ...
Ted Shifrin's user avatar

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