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a minor typo
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Martin Sleziak
Martin Sleziak
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I would have preferedpreferred to write this as a comment, but I'm lacking rep. Does this help?: The universal cover for $SL_2(R)$ is also the universal central extension and hence centrally closed (i.e. it coincides with its universal central extension) as an abstract group.

I would have prefered to write this as a comment, but I'm lacking rep. Does this help?: The universal cover for $SL_2(R)$ is also the universal central extension and hence centrally closed (i.e. it coincides with its universal central extension) as an abstract group.

I would have preferred to write this as a comment, but I'm lacking rep. Does this help?: The universal cover for $SL_2(R)$ is also the universal central extension and hence centrally closed (i.e. it coincides with its universal central extension) as an abstract group.

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Benjamin Westrich
Benjamin Westrich
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I would have prefered to write this as a comment, but I'm lacking rep. Does this help?: The universal cover for $SL_2(R)$ is also the universal central extension and hence centrally closed (i.e. it coincides with its universal central extension) as an abstract group.