Code Snippet Series expansion with swiginac (linux)
This script computes the formal series expansion of a mathematical function on the command line using the python module swiginac, an interface to the CAS Ginac. Typical invocation in a linux terminal looks like $ serexp.py -n 7 "log(1+x)*(1+x+x**2)**(-1)" 1*x+(-3/2)*x**2+5/6*x**3+5/12*x**4+(-21/20)*x**5+7/15*x**6+Order(x**7) As far as I know, swiginac does not work in windows, so use a virtual (k)ubuntu machine in this case.
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Code Snippet Fibonacci in C#
Yes, I know Fibonacci(=sun of a good man) again. Most famous for his series, but who among you all, know that he was the man who introduced to the Western world, the Arabic numeral system(including zero) in 1202 A.D.? The Italian merchands of those days adored it. It was far more easy to work with than the roman numeral system of course. And it is still in use today. I did the series a little different with a calculation that gives you any Fibonacci number from zero up to the 93th one. I guess the Convert method does the rounding. …
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