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    Re: Closest point of approach.
    From: Antoine Couëtte
    Date: 2012 Jan 3, 02:08 -0800

    ... However, the least distance between 2 lines in space - for example the track of 2 A/C at different levels - is not a trivial computation, as I can remember. It showed in the HP41 Calculator Mathematics and Geometry Solutions Booklet as their very last example if I can recall correctly.

    And to you, Gary, if you did solve it just lately (sorry, no time to look into it, I will be fly back to Europe shortly) in 3 dimensions, then ... Attaboy.

    Happy New Year to all

    Kermit

    Antoine M. Cou�tte
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