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Let G a connected algebraic group over a field k (caract=0). what is the universal covering of G ?

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Does the discussion on math.stackexchange.com/questions/3183/… help at all? – Yemon Choi Jun 16 2011 at 1:13
The universal covering of G is a simply-connected algebraic group equipped with a homomophism to G such that the kernel is a discrete group. ;-)... or did you mean to ask for a construction? (sorry, couldn't help myself) – David Roberts Jun 16 2011 at 3:04
Please see the "how to ask" page and edit the question to be more precise. I'm inclined to close for reasons of "not a well-defined question". – S. Carnahan♦ Jun 16 2011 at 3:46
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 I'm inclined to vote to close for reasons of "no evidence of typing the question into Google" - presumably the OP has done this and not understood something, which is fine once he or she tells us what this thing is. – Yemon Choi Jun 16 2011 at 3:50
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 @ David, the universal covering may be proalgebraic, think of the cover of the multiplicative group of the field! – Bugs Bunny Jun 16 2011 at 5:36
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closed as not a real question by Mariano Suárez-Alvarez, Bugs Bunny, Bruce Westbury, Todd Trimble, Yemon Choi Jun 16 2011 at 20:22

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