Question: Consider the group structure on the open interval (-1, 1) C R, defined by s+t 1 + st Prove that it is continuously isomorphic to

Consider the group structure on the open interval (-1, 1) C R, defined by s+t 1 + st Prove that it is continuously isomorphic to (R, +), that is, there is a group isomorphism which is also a homeomorphism

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