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Feb 7, 2011 at 10:59 comment added berl1313 Thank you for the answer. Could you please tell me the argument for this. So why is it the orientation-reversing involution?
Feb 7, 2011 at 8:00 comment added Oscar Randal-Williams Yes, if it admits an orientation-reversing involution.
Feb 6, 2011 at 21:13 comment added berl1313 You are right, so perhaps a better question is the following. Let there be a given surface $X$. Is there some method to find out if it is the orientation covering of some nonorientable surface?
Feb 6, 2011 at 18:19 comment added Dan Ramras It's not at all clear to me that "the complex structure" makes sense. There are many complex structures on a compact, orientable surface. How would you associate one such structure to a surface, just based on the fact that it double covers something non-orientable? What would you like this structure to satisfy?
Feb 5, 2011 at 16:43 comment added berl1313 I think my question was not precise. In fact, I was asking for the complex structure. The topological classification is clear as you all pointed out.
Feb 4, 2011 at 20:18 answer added Dan Ramras timeline score: 1
Feb 4, 2011 at 14:08 comment added Oscar Randal-Williams This is not a question: you have a construction of a particular 2-fold covering space as the orientation cover (= sphere bundle of determinant bundle), and want to know whether it identifies a unique double cover. Of course it does, it is a construction.
Feb 4, 2011 at 13:36 answer added Mark Grant timeline score: 1
Feb 4, 2011 at 13:01 answer added Andrea Ferretti timeline score: 7
Feb 4, 2011 at 11:57 history edited berl1313 CC BY-SA 2.5
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Feb 4, 2011 at 11:43 history asked berl1313 CC BY-SA 2.5