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Math Help - Orthogonality

  1. #1
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    Oct 2009
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    Orthogonality



    I was thinking about using the chain rule because
    (Dh)_t = ((Dh)_a(t)) o (Da)_t where I believe ((Dh)_a(t))=(grad h)(a(t))
    but couldn't really relate this to a dot product that would be 0.
    Any help would be greatly appreciated. Thanks
    Last edited by JohnLeee; October 31st 2009 at 11:29 AM.
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  2. #2
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    We have that h\circ \alpha (t)=c for all t\in U. Thus (h\circ\alpha)' is identically 0 in U. Just apply the chain rule.
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