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    Re: Mathematics Question
    From: Alexandre Eremenko
    Date: 2006 Mar 30, 08:14 -0500

    I call it a spherical cup.
    Some mathematicians call it a "spherical cap" :-)
    Others call it a "disc on the sphere", and even
    a "spherical disc".
    A
    
    On Wed, 29 Mar 2006, Robert Eno wrote:
    
    > A math question for list:
    >
    > Given that a segment of a circle
    > is called an "arc", can anyone
    > tell me what its two-dimensional
    > equivalent on a sphere is called?
    >
    > Robert
    >
    
    
    

       
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