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Show that a subset D R is closed if and only if whenever {x n } is a sequence in D converging to some x
Show that a subset D R is closed if and only if whenever {xn} is a sequence in D converging to some x R we have that x is in D.
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New Trends In Algebraic Geometry
Authors: K Hulek ,M Reid ,C Peters ,F Catanese
1st Edition
0521646596, 978-0521646598
