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A geometric progression is a sequence of numbers obtained after multiplying the former by a constant called the rate of progression. For example: 5, 15, 45, etc., is a series whose ratio is 3.
Then to...
I'll admit I know almost nothing about Mathematica. I've heard of it, certainly. I tinkered with it a few times, too. But until I spoke with Sal Mangano, author of the "Mathematica Cookbook," I assume...
Given a longitude and a latitude, what's the great circle distance between them? The formula for this computation, and many others, is available at the Aviation Formulary, by Ed Williams:
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