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Math Help - torus, homeomorphic, deformation retraction

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    torus, homeomorphic, deformation retraction

    Let T be a torus, and let X be the complement of a point in T. Find a subset of X which is homeomorphic to a figure "8" curve (i.e. the union of two circles with a single point in common) and which is a deformation retract of X.

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    Last edited by GenoaTopologist; February 19th 2009 at 01:39 PM.
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