This software uses algorithms and source code to calculate the lexicographic order of combinations. It includes both compiled program and source code, and can find the rank or index for a combination using two algorithms, or vice versa.

The source code utilizes two different algorithms to determine the index or rank for a combination, or find a combination for a given rank. The first algorithm was discovered by B. P. Buckles and M. Lybanon back in 1977, while the second was created by Ion Saliu in 2001. Both of these lexicographical algorithms are lightning fast, with calculations that happen almost instantaneously.
These algorithms are also flexible and can be expanded to suit even more complex sets, such as Powerball/Euromillions lottery games. Given this versatility, it's no surprise that so many programmers and scientists are eager to explore the possibilities and benefits of using this software!
And unlike other tools out there, this software solves both the rank and combination problems with ease, making it the first successful software of its kind. The computer programmer responsible for this software has even expanded their knowledge from combination sets to all four numerical sets: Exponents, permutations, arrangements, and combinations.
But that's not all - there's also a high-speed function included which calculates combinations of N numbers taken M at a time (perfect for games like a 6-49 lotto). This function works flawlessly at the command prompt for maximum efficiency, and supports all 32/64 bit versions of Windows.
In conclusion, this software is the ultimate solution for working with lexicographical order, combinatorics, formulas, mathematics, and more. For further information, be sure to check out the membership and lexicographic pages!
Version 1.0: The software is accompanied by a text tutorial.