# NavList:

## A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

**Re: Mathematics Question**

**From:**Robert Eno

**Date:**2006 Mar 30, 12:09 -0500

I am still laughing out loud at your posting Herbert, but I like the idea of being immortalized in the world of mathematics; especially a branch related to navigation. Try this one: Enoid: a mathematical term used to describe the area on the surface of a sphere encompassed by a small circle. I think this works. Enoid it is! Now if we can get the mathmaticians to agree to its use. But this brings me to another question: how would one calculate the surface area of an Enoid? Robert ----- Original Message ----- From: Herbert PrinzDate: Thursday, March 30, 2006 11:49 am Subject: Re: Mathematics Question > Robert Eno wrote: > > >I was refering to the curved surface of the sphere. For a circle, > it is called an "arc" but I have yet to find a proper name for a > portion of the surface of a sphere. I have heard different terms > such as "lune", "lens" "cap" etc. but I am certain that there has > to be a proper mathematical term for this. Or is there? > > > > > All these terms refer to solid bodies. Lune usually refers to a > 2-dimensional shape that results from intersecting two circles. I > guess,by analogy, one could speak of a 3-dimensional (i.e. solid) > lune. > The beauty of math is that you can use words that aren't in the Oxford > English Dictionary. If you need a word badly, coin it. If it turns out > to be important you will get famous for it. Even better: Don't > coin a > word. Use a long winded descriptive term each time you need it. > Somebodywill get frustrated after a while and call it "Enoid". > > Herbert >