the questions below for scientific debate(adsbygoogle = window.adsbygoogle || []).push({});

1.how to understand SL(2,R)/SO(2,r)=H^2(2-dim hyperbolic space)

2.Let M be a compact manifold ,T compact lie group,what can we say about

M^T(the set of fixed points of M under the action of T),is M^T manifold?

how to argue?further,if T is torus,and M is T-set,how to see

Euler number (M)=Euler number (M^T) (This was a PM to me)

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# SL(2,R)/SO(2,r)=H^2(2-dim hyperbolic space)

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