I have a number of Mathematica notebooks using complex differential equations from when I was using Mathematica 3. My concern is that with a current good computer it is taking about the same amount of time to run my notebooks in Mathematica 13 as it did in Mathematica 3 twenty years ago. The memory usage has increased from a few hundred MB to thirteen GB. Has anyone experienced anything similar? Any explanations?
I have included a Mathematica notebook and package. Both contain documentation but the application is based on the evaluation of combinatorial enumerated structures and is difficult to follow without understanding both dynamics and combinatorics.
Edit: Stephen Wolfram suggested I submit my work to Wolfram Functions on extending tetration to the complex numbers and the same for the Ackermann function. This code forms the foundation for extending tetration.
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