Are SU(2) and SO(3) Groups Really Isomorphic?

ber70
Messages
47
Reaction score
0
I have not seen why SU(2) and SO(3) groups are isomorphic?
 
Physics news on Phys.org
They aren't isomorphic. SU(2) is a double cover of SO(3).
 
Their Lie algebras are isomorphic, and they are locally isomorphic...but D H is right - they aren't isomorphic!
 
Prove $$\int\limits_0^{\sqrt2/4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx = \frac{\pi^2}{8}.$$ Let $$I = \int\limits_0^{\sqrt 2 / 4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx. \tag{1}$$ The representation integral of ##\arcsin## is $$\arcsin u = \int\limits_{0}^{1} \frac{\mathrm dt}{\sqrt{1-t^2}}, \qquad 0 \leqslant u \leqslant 1.$$ Plugging identity above into ##(1)## with ##u...
Back
Top