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Math Help - Urgent help: what is an ordinal sum?

  1. #1
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    Urgent help: what is an ordinal sum?

    Help please!

    Two associative functions on the the unit square:
    [0,1]^2 -->[0,1]
    x,y --> T(x,y) and S(x,y)
    What is the ordinal sum of these two functions on [0,1]^2 ? I know it is not T(x,y)+S(x,y)
    Does ordinal some have something to do with ordinal numbers?
    Last edited by SkanderH; February 15th 2006 at 07:43 PM. Reason: mistake
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